v0.34:Strange mood

xTATTEREDx  · +FINE+  · *SUPERIOR*  · ≡EXCEPTIONAL≡  · ☼MASTERWORK☼

v50.15 · v0.47 · v0.34.11 · v0.31 · v0.28 · v0.23 This article is about an older version of DF. More Info · V

This article or section contains minor spoilers. You may want to avoid reading it.

Periodically, individual dwarves are struck with an idea for a legendary artifact and enter a strange mood. Dwarves which enter a strange mood will stop whatever they are doing and pursue the construction of this artifact to the exclusion of all else. They will not stop to eat, drink, sleep, or even run away from dangerous creatures. If they do not manage to begin construction of the artifact within a handful of months, they will go insane and die soon afterward.

Note: All controllable civilizations are currently able to enter strange moods, though in earlier versions of DF the only civilization this applies to is dwarves.

Overview

1. The conditions necessary for a strange mood to occur are not fully understood, although they may possess even dwarf children.
2. The game will pause, center on a dwarf, and announce that the dwarf has entered one of five different types of strange moods. The types of moods are listed below. While in a mood, a dwarf will display a blinking exclamation point (see status icons).
3. For the duration of the mood, the dwarf will claim a workshop related to the skill that the mood affects (not all skills are eligible), kick out any dwarf who was using it, and render it otherwise unusable until the mood has ended. If a moody dwarf does not claim a workshop, it is because the appropriate workshop does not exist. (See skills and workshops below to determine which workshop(s) might be required.) A moody dwarf will not be able to build a needed workshop; another dwarf with the appropriate labor designation must do so for them, if one is necessary. Furnaces are also counted as a workshop.
4. After claiming a workshop, the dwarf will set about collecting the required materials for their artifact. If the dwarf remains idle inside the workshop, it's because they cannot find the right material. Reference the demands section to determine what may be required. Important Note: They will only collect these materials in the order that they require them. In other words, you have to determine where they are on the list of required materials and then provide the next one before they will continue collecting other materials.
5. Once all materials have been gathered, the game will once again pause and center, and the moody dwarf will begin construction. Upon completion the dwarf will create a semi-random artifact related to the skill affected and gain legendary (or higher) status in that skill (unless the mood type is possessed). See the skills and workshops for information on which skills can be gained, or the artifacts created section for more details on the artifacts themselves.

Types of moods

For each of the following types of moods, the first message is how the mood is announced; the second message appears in the dwarf's profile when he or she is viewed with the v key. All moody dwarves will have "Strange Mood" listed as their active task and are "quite content", regardless of any recent thoughts they may have had.

Fey

• <dwarf> is taken by a fey mood!

Has the aspect of one fey!

This is the most basic strange mood. Fey dwarves will clearly state their demands when the workshop they are in is examined.

Secretive

• <dwarf> withdraws from society...

Peculiarly secretive...

Secretive moods are the same as fey moods, except a secretive dwarf will sketch pictures of their required materials instead of clearly stating their demands if they cannot find what they need. Descriptions of all these secretive requirements can be seen only by viewing the workshop that the moody dwarf has claimed, with q, and then only while the dwarf is waiting inside it. More than one "picture" is likely; these will cycle through the entire list automatically if any one is not available. (Since materials are gathered in order, it's quite possible that only one of a long list is needed to allow the moody dwarf to continue on their project. If the dwarf has gathered some of the materials (seen as "tasked" when looking at the workshop with t), then the next in the list is what they are looking for.)

Possessed

• <dwarf> has been possessed!

Possessed by unknown forces!

Possessed dwarves have cryptic material requests, and have the unfortunate distinction of not receiving any experience upon successful construction of an artifact. No controllable circumstances lead to a possessed mood instead of one of the more desirable fey or secretive moods. It is pure luck-based. Possessed dwarves will mutter the name of the artifact they are working on (which, under some circumstances, might end up being their own name) once they have all the materials they need.

A possession is the only mood that does not result in a jump in experience.

A possessed dwarf that "keeps muttering <name of the artifact>..." has already gathered everything it needs.

Fell

• <dwarf> looses a roaring laughter, fell and terrible!

Has a horrible fell look!

A dwarf that goes into a fell mood will always take over a butcher's shop or a tanner's shop. If neither are available, any other workshop will be used instead. The dwarf will then murder the nearest dwarf, drag the corpse into the shop and make some sort of object out of dwarf leather or bone. Once the artifact is completed, the fell dwarf will become a legendary bone carver or leatherworker. Only unhappy dwarves may enter a fell mood.

Amusingly, it seems fell dwarves can murder ghosts as well.

Aside from the loss of a potentially important dwarf in the wrong place at the wrong time, there doesn't seem to be any downside to a fell mood. The end result is always an artifact and a legendary craftsdwarf. Since the only ingredient used (a dwarf) is available in abundance, a fell mood will only fail if the fell dwarf is completely isolated from other dwarves, or if the proper workshop does not exist.

If no one is around to witness the murder, whichever dwarf Urist McEmo decides to slaughter will be reported as missing some time after his death. If the murder is witnessed, the moody dwarf will be subject to dwarven justice.

Macabre

• <dwarf> begins to stalk and brood...

Brooding darkly...

Macabre moods are similar to fell moods, but the dwarf will not murder a fellow dwarf. A macabre dwarf may require bones, skulls^[Verify], or vermin remains; if you do not happen to have any, you will have to make some, e.g. by butchering an animal and/or allowing a cat to go hunting, or let the moody dwarf go insane. Like fell moods, only unhappy dwarves can enter macabre moods.

Caveats

• Shells are perhaps the most difficult to obtain material for a strange mood, though there are several creatures that produce shells. Some of these, such as armadillos and common snapping turtles, are butcherable. Nautiluses can also serve as sources of shells when cleaned at a fishery. Nevertheless, shells are rare and hard to acquire. Currently, the only way of trading for shells is to hope that the elven caravan brings some tamed shell-producing large creature. Traded cave lobsters and turtles are processed fish (with the shells already removed). Tamed vermin with shells cannot be butchered for their shells, since the only way to get a vermin's shell is to clean it. Since all shelled non-vermin animals are exotic, only elves will bring them. If you should be fortunate enough to acquire some breeding shelled butcherable animals, it's probably worth keeping a breeding pair around in case of future need. Only dwarves with a preference for shells will demand shells in a strange mood.
• Should the claimed workshop be a magma forge and lose power due to insufficient magma beneath it, the mood will fail immediately and the dwarf will go insane. Should the forge be in danger of losing power, you should forbid it before it is claimed and wait until it is powered up reliably. Once magma forges are built, at least some dwarves will no longer be satisfied with a regular forge.
• The mood's primary material will only be mentioned once in the dwarf's requests, even if the dwarf wants more than one unit of it. [1]
• The item type of the artifact to be created is not decided until the instant the mood ends. Saving (even after a dwarf has begun to gather materials) will allow you to reload and the result may be a different artifact (unless the moody dwarf's preferences force a particular item type). If you want to get an artifact platinum warhammer, make sure to have platinum nearby and/or block access to any other materials. You can reload the artifact creating process, even after the dwarf has gathered most of components by forbidding the claimed items (use t to view the contents of the workshop, select the undesired material, and press f to forbid it). If other items of that type are available, the dwarf will immediately switch to them.
• Requests for bones are actually requests for any kind of bone stacks, not individual bones. [2]

Demands

Once a workshop is claimed, the dwarf will begin collecting materials. Each artifact will require 1-3 "base items" and up to 7 additional items for decorations. The dwarf may well need several items of one material! If the moody dwarf remains idle, then the necessary materials are not available. Forbidden items must be reclaimed (d - b - c) before they may be used, but moody dwarves will ignore settings regarding economic stone. Press q and highlight the workshop to receive a series of clues about what the dwarf needs. Hints that stay active for longer than 2 seconds mean that multiple pieces of that material will be required; each single demand will be displayed for 2 seconds, so if it says "gems... shining" for 6 seconds, 3 gems are demanded. However, the mood's primary material will always be shown for only 2 seconds even if more than one is required. Materials will always be fetched in order, so if at least one item has already been retrieved (the items will show up with "TSK" ("task") next to them when the workshop is viewed with the t context menu), it will usually be possible to tell what item is required next.

If you want your dwarves to construct their artifacts out of valuable materials instead of whatever useless thing happens to be close at hand, you can selectively forbid types of material through the stocks screen so that only the material you want them to use is available; though this might interfere with the normal crafting operations of your fortress, the disruption is generally short-lived (as long as you remember to unforbid them again afterwards!). You can even forbid something a moody dwarf is carrying (which may be necessary sometimes, since while they are not waiting in the workshop they will not tell you what they need); the dwarf will finish hauling it to the workshop, but then immediately go searching for another. This trick can mean the difference between a bauxite statue decorated with moss agates and a native platinum statue encrusted with diamonds. Be aware that this may not always work - see below for more information.

Burrows allow even better control over a moody dwarf's material usage. Simply by creating a burrow around the claimed workshop and another part over the desired material, a moody dwarf can be controlled without forbidding every single stone in the fortress. A moody dwarf will follow the burrow-definitions just like a regular worker, but be mindful that they will not leave the burrow to get materials that are outside of their assigned burrow. A problem can arise when bones from an outside refuse stockpile are needed by a moody dwarf that is assigned to a burrow.

The various demands are translated here:

Material	Fey	Secretive	Possessed
	<dwarf> screams "I must have <demand>!"	<dwarf> sketches pictures of <demand>.	<dwarf> mutters "<artifact> needs <demand>..."
Stone	rock	a quarry	stone... rock
Stone/metal blocks	rock blocks	square blocks	blocks... bricks
Wood	wood logs	a forest	tree... life
Metal bar	metal bars	shining bars of metal	bars... metal
Gems (cut)	cut gems	cut gems	gems... shining
Gems (raw)	rough gems	rough gems	rough... color
Green glass	raw green glass	glass	raw... green
Clear glass	raw clear glass[Verify]	glass and burning wood	raw... clear
Crystal glass	raw crystal glass[Verify]	rough gems and glass	raw... crystal
Bone stack [Verify]	bones	skeletons	bones... yes
Shell[Verify]	shells	shells	a shell...
Leather	tanned hides	stacked leather	leather... skin
Cloth (plant fiber)	plant cloth	stacked cloth	cloth... thread
Cloth (silk)	silk cloth	stacked cloth	cloth... thread
Cloth (yarn)	yarn cloth	stacked cloth	cloth... thread
Skull[Verify]	body parts	death	a corpse

Dwarves in macabre moods will list their demands in the same fashion as those in fey moods (though with them brooding "Yes. I need <item>." instead of screaming "I must have <item>!"). They may also say "Leave me. I need... things... certain things", in which case they want special items such as skulls or vermin remains. Moody dwarves demanding rock blocks will also accept blocks forged from metal bars.

• The first item demanded by the dwarf is based on the mood skill being used - stoneworkers (miners, engravers, masons, stone crafters, and mechanics) will demand boulders, woodworkers (carpenters, wood crafters, and bowyers) will demand logs, leatherworkers and tanners will demand leather, weavers and clothiers will demand cloth, metalworkers will demand metal bars, gem cutters/setters will demand rough gems, glassmakers will demand raw glass, and bone carvers will demand bones.
  • Metalworkers will demand their favorite type of metal if you have smelted any bars of it - fey moods will state this outright, while for secretive moods and possessions you will need to check the dwarf's preferences to see which metal they like. If you have any adamantine wafers available, then they will demand that instead.
  • Weavers and clothiers who have a preference for any type of silk, plant fiber cloth, or yarn will demand that generic type (e.g. a dwarf that likes cave spider silk will require any type of silk), and a dwarf who likes more than one type of cloth will demand whichever one appears first in their list. If you have any adamantine cloth available, then they will demand that instead.
  • Glassmakers will demand their preferred type of glass if you've produced any of it (or if it's green glass); if they don't prefer any type of glass, they will randomly select one type of glass you've produced (though they will always assume you have created green glass). Note that acquiring raw glass from a caravan does not count as producing it.
  • Dwarves in macabre moods will select 1-3 vermin remains, stacks of bones, or skulls.
  • Bone carvers will demand shells if they like a type of shell; if not, they will demand bones.
  • All preference-based material requests are decided the instant the mood begins - by the time the workshop is claimed, it is too late to change the dwarf's mind.
• The remaining "decoration" items are selected randomly from the following list: wood logs, metal bars, small gems, rock blocks, rough gems, boulders, bones, leather, plant/silk/yarn cloth, or raw glass (green/clear/crystal, based on what you've produced).
  • Decoration items will never be the same type as the primary mood material.
  • Certain mood professions will also explicitly avoid using certain items for decorations - most of these match up with the primary mood material, but miners, engravers, masons, and stone crafters will additionally avoid requesting rock blocks.
  • If you have not produced any raw glass in your fortress, moody dwarves will never request it.
  • Dwarves in macabre moods have a 50% chance to replace each decoration item with either remains or bones.
• Gem cutters and gem setters have a 50% chance of only gathering a single rough gem and nothing else - when they do this, they produce a "perfect gem" with a single decoration.

Once all materials have been gathered, viewing the workshop with q will display a special message depending on the type of mood:

• Fey - "<dwarf> works furiously!"
• Secretive - "<dwarf> works secretly..."
• Possessed - "<dwarf> keeps muttering <artifact>..."
• Macabre - "<dwarf> works, darkly brooding..."
• Fell - "<dwarf> works with menacing fury!"

The mechanics of moods

Frequency

When a fortress is started, an internal counter is set to 1000. Every 100 frames (12 times per day), this counter is decremented by 1, running down to zero in about 3 months. When the counter would ordinarily be decremented when it has already reached zero, there is a 1 in 500 chance that a strange mood will strike. This means that, once all conditions are met and the clock is ticking, while there is approximately a 2.4% chance of a strange mood per day, or very approximately a 50% chance of a strange mood per month, there is no guarantee when a mood will strike - might be sooner, might be (almost) never.

Conditions

In order for a dwarf to be struck with a strange mood, three conditions must be met:

• There is no currently active strange mood,
• The maximum number of artifacts is not met,
• There are at least 20 eligible dwarves (see below), including dwarves who have already created artifacts.

If all three of these conditions are true, the game may trigger a strange mood according to the frequency.

Maximum number of artifacts

The maximum number of artifacts in any one fortress is limited by the lower of:

• The number of items created divided by 100.¹ Mined-out rock does count as an "item created", though it is not clear whether bolts or units of drink are counted individually.
• The number of revealed subterranean tiles divided by 2304 (this is an area equivalent to a 48x48 square). Once you discover and explore the caverns and magma sea, this limit becomes largely irrelevant, and using a "reveal" utility will eliminate it altogether, though strip-mining an area entirely and exposing it to the surface will count against this.

¹ - actually the sum of all items by type and by type+subtype+material, divided by 200. Furthermore, destroying items does not decrement these counters, so casting and mining obsidian will count toward this.

Eligibility

The deciding factor for eligibility is a dwarf's actual profession. (Note that "custom professions" have no effect on this!) Thus, dwarves may enter strange moods regardless of what skills they have or don't have, so long as they are of an acceptable profession. Dwarves who have already created an artifact are not eligible to create another, and since every mood ends in either an artifact or death, every dwarf may enter at most one mood. Dwarves who have obtained one or more legendary skills without creating artifacts may enter strange moods and will simply become even more legendary.

Dwarves with a military profession other than "Recruit" cannot enter moods. Incidental military skills make no difference - eligibility (and weighting) depends purely on the actual profession as listed at the time, so soldiers can enter moods if they are off duty and thus in Civilian mode. Children may enter moods, but babies will not.

Any other profession is eligible to enter a mood, but not all have the same chance to enter a mood...

(Note - Specifically, and to avoid previous misunderstandings, Strand extractor, Clerk/Administrator/Trader, Doctor (and related), Architect, Recruit and Child are moodable professions.)

There are several additional factors which will prevent a dwarf from entering a mood:

• Being unable to pick up items ("cannot grasp")
• Being dragged by another unit (off to jail)
• Dragging another unit (leading livestock to a cage, chain, pasture, pit/pond zone, or to the butcher's shop)

Chance

When determining who will have a strange mood, each eligible dwarf is put into a weighted lottery. The odds are assigned a higher or lower weight based on the dwarf's profession. The default weight is 6, but some professions are more likely to enter a strange mood than others. (This is like most dwarves getting 6 tickets to the lottery, and others getting more.)

Weighting	Professions
21	Armorer, Blacksmith, Bone Carver, Clothier, Craftsdwarf, Jeweler, Gem Cutter, Gem Setter, Glassmaker, Leatherworker, Metalcrafter, Metalsmith, Stonecrafter, Weaponsmith, Weaver, Woodcrafter
11	Bowyer, Carpenter, Stoneworker, Mason, Woodworker
6	Engraver, Mechanic, Miner, Tanner, & all other professions (including Peasant).

Example: What this means is: if you had 21 dwarves, made up of 20 eligible farmers, furnace operators, miners, woodcutters etc. (with 6 chances each) plus one Armorer (with 21 chances), that one Armorer would have a 21 in 141 chance (20 dwarves x 6 chances each = 120 + 21 chances more = 141 total) of the mood striking them. That's about 1 in 7, while the other 20 have a 6 in 141 chance each, or about 1 in 24. The odds are still against the armorer, but much better than for any other single dwarf.

Note that not every profession is from a moodable skill. A Soaper, Architect, Furnace Operator or Strand Extractor can be taken by a mood, but that will not make those skills legendary, nor will they create an artifact bar of soap, building, bar of metal or wafer of adamantine.

Skills and workshops

Highest skill	Workshop required
Armorsmith	Metalsmith's forge (or Magma forge)
Bone carver	Craftsdwarf's workshop
Bowyer	Bowyer's workshop
Carpenter	Carpenter's workshop
Clothier	Clothier's shop
Engraver	Craftsdwarf's workshop
Gem cutter	Jeweler's workshop
Gem setter	Jeweler's workshop
Glassmaker	Glass furnace (or Magma glass furnace)
Leatherworker	Leather works
Mason	Mason's workshop
Mechanic	Mechanic's workshop
Metal crafter	Metalsmith's forge (or Magma forge)
Metalsmith	Metalsmith's forge (or Magma forge)
Miner	Mason's workshop
Stone crafter	Craftsdwarf's workshop
Tanner	Leather works
Weaponsmith	Metalsmith's forge (or Magma forge)
Weaver	Clothier's shop
Wood crafter	Craftsdwarf's workshop
<none>	Craftsdwarf's workshop

A dwarf will claim a workshop according to their highest applicable skill, and upon completion of the artifact, gain 20,000 experience in that skill (excluding possessed dwarves). This will give the dwarf a legendary-level skill (specifically, "legendary+1" or higher, depending on the dwarf's initial skill level). The table to the right describes all applicable skills and their potential workshop requirements - there are only 20 skills that determine the workshop and that can be affected by a mood (sometimes referred to as moodable skills.) If a dwarf does not possess at least one of the moodable skills listed to the right, they will take over a craftsdwarf's workshop and gain one of bone carver, stone crafter, or wood crafter skills, producing an artifact craft.

When selecting the desired mood skill, only the level itself is checked, and if the highest level found is shared by multiple skills, then one will be selected randomly.

This fact can be utilized to maximize the possibility of getting a dwarf with the specific legendary skill you want: since non-moodable skills are ignored, whenever possible make sure that each dwarf's highest moodable skill is one of those you want. Have all your peasants, farmers, non-professional military and other dwarves without any moodable skills do a tiny bit of work in the skill(s) you most want; if a "dabbling" skill is the highest moodable skill they have, that is the skill that will be used.

Weaponsmith, Armorsmith, Bowyer, Leatherworker, Clothier, and Mechanic are the only skills that provide a uniquely beneficial item other than an extremely valuable trinket or piece of furniture. Note that artifact furniture is useful for increasing room value.

Artifacts created

The type of artifact created depends on the type of mood, the dwarf's highest moodable skill, and the base material. Masons and miners will always create some kind of stone furniture; bone carvers, a bone or shell object (including furniture); carpenters, a piece of wooden furniture; engravers and stone crafters, a stone craft; metalworkers, metal crafts, weapons, or armor (depending on the type of metalworker); weavers and clothiers, an article of clothing; tanners and leatherworkers, a leather armor or object. If a dwarf has no moodable skills, they will randomly select stone crafting, wood crafting, or bone carving as their mood skill and produce their artifact accordingly. The precise type of craft created is usually somewhat random, but if a dwarf has a personality preference for a particular thing, such as gauntlets or floodgates or crowns, and that thing is an available choice given the dwarf's profession, they are guaranteed to create an object of that type (if multiple preferences match, one will be randomly selected).

The first object grabbed by the dwarf will be the base material; all other materials will be used as decorations. If a dwarf grabs a piece of chalk and makes a statue, for instance, it will be a "chalk statue", but an artifact can potentially include bone, cloth, gems, leather, metal, shell, stone, and wood decorations all at once. In some cases, a moody dwarf will produce an item which normally cannot be made from that material, leading to such odd constructions as an obsidian bed, ruby floodgate, or turtle shell cage, but the actual item types available for each mood type are still very much restricted (e.g. only a glassmaker or jeweler can make a window, and a moody clothier cannot produce an article of clothing that could not normally be made from cloth).

Mood / Skill	Artifact type
Armorsmith	Each equipment item with [METAL] (mail shirt, breastplate, leggings, greaves, gauntlet, low boot, high boot, cap, helm, mask), any shield
Bone carver (bone)	Each equipment item with [BARRED] (leggings, greaves, gauntlet, helm), any shield, instrument, toy, door, bed, chair, table, statue, chest, bin, armor stand, weapon rack, cabinet, coffin, floodgate, hatch cover, grate, chain, cage, animal trap, figurine, amulet, scepter, crown, ring, earring, bracelet, any weapon, any trap component†
Bone carver (shell)	Each equipment item with [SCALED] (leggings, gauntlet, helm), figurine, amulet, crown, ring, earring, bracelet, chain, cage, animal trap, instrument, toy
Bowyer	Each ranged weapon (crossbow, bow, blowgun)
Carpenter	Door, bed, chair, table, statue, chest, bin, armor stand, weapon rack, cabinet, coffin, floodgate, hatch cover, grate, cage, barrel, bucket, animal trap, splint, crutch
Clothier	Each equipment item with [SOFT] (dress, shirt, tunic, toga, vest, robe, coat, cloak, cape, trousers, loincloth, thong, short skirt, skirt, long skirt, braies, glove, mitten, sock, sandal, shoe, chausses, cap, hood, mask, turban, head veil, face veil, headscarf), bag, rope
Weaver
Engraver	Figurine, amulet, scepter, crown, ring, earring, bracelet, goblet, instrument, toy
Fell Mood	Each equipment item with [LEATHER] (dress, shirt, tunic, toga, vest, robe, coat, cloak, cape, armor, trousers, loincloth, thong, short skirt, skirt, long skirt, braies, leggings, glove, mitten, sock, sandal, shoe, chausses, low boot, high boot, cap, hood, mask, turban, head veil, face veil, headscarf, helm), any shield, bag, backpack, quiver, instrument
Leatherworker
Tanner
Gem cutter	Door, bed, chair, table, statue, box, armor stand, weapon rack, cabinet, coffin, floodgate, hatch cover, grate, figurine, amulet, scepter, crown, ring, earring, bracelet, chain, flask, goblet, cage, barrel, bucket, animal trap, window, instrument, toy
Gem setter
Glassmaker
Macabre Mood (vermin remains)	Amulet, bracelet, earring
Mason	Door, bed, chair, table, statue, quern, millstone, coffer, armor stand, weapon rack, cabinet, coffin, floodgate, hatch cover, grate
Miner
Mechanic	Mechanism
Metal crafter	Figurine, amulet, scepter, crown, ring, earring, bracelet, chain, flask, goblet, instrument, toy
Metalsmith	Door, bed, chair, table, statue, chest, armor stand, weapon rack, cabinet, anvil, coffin, floodgate, hatch cover, grate, cage, barrel, bucket, animal trap, pipe section†, splint, crutch
Stone crafter	Figurine, amulet, scepter, crown, ring, earring, bracelet, goblet, instrument, toy
Weaponsmith	Any weapon, any trap component†
Wood crafter	Figurine, amulet, scepter, crown, ring, earring, bracelet, goblet, instrument, toy

^† chance of selection for this entry is reduced by 90%

If your dwarf does not have a preference for any possible items, the game will randomly select one from the list. Entries with "any" are treated as collective entries with a single chance and will randomly choose a subtype which your civilization is capable of making. This explains why bowyers and clothiers will regularly produce foreign artifacts, while weaponsmiths will not unless they have exotic preferences.

Success

Once created, most artifacts will be available for use just like a normal item of its type. Artifact armor and weapons gain extra bonuses in combat, while artifact clothing is immune to wear. Artifact mechanisms installed in weapon traps will improve attack rolls. Artifact furniture is useful for raising the value of a noble's room. Artifact mechanisms, trap components, or weapons in weapon traps can also boost a room's value considerably. Other artifacts that can be used in construction (such as barrels, buckets, and anvils) may be used similarly. Artifact doors and hatches are immune to building destroyers. Artifact crafts are currently useless, and artifact cages should not be used to hold hostile creatures--due to a bug they can escape.

Successfully creating an artifact grants a very strong happy thought (enough to make the creator totally ecstatic for several months) as well as granting the creator partial immunity to insanity - even if your fortress enters a tantrum spiral, any dwarf who has created an artifact is exempt from going insane due to prolonged unhappiness.

Failure

If you can't provide the desired workshop and all the required component materials within a couple of months, the dwarf will go insane, which cancels the mood and the artifact. As if that's not bad enough, any dwarf who goes insane will soon die, one way or another.

A dwarf who is stark raving mad or melancholy is harmless to others (until they die and start a tantrum spiral), but a berserk dwarf will attack other dwarves and possibly pull levers at random. You may want to station a squad nearby or assign a few war dogs to the dwarf on the chance that they will lash out. If you build your workshops inside enclosed rooms with doors you can also lock the moody dwarf in the room until he or she starves. In extreme cases, building a wall around an open workshop is the best precaution.

Bugs

There are many bugs reported related to moody dwarves. As has been the case in 40d, most turned out to be (understandable) failures of the player to grasp the mechanics of artifact creation and demands. (Bug tracker)

• Moody dwarves don't respect burrows when grabbing a workshop, but do when looking for items. ^Bug:1416 If a dwarf's claimed workshop is outside their assigned burrow, the dwarf will continue to grab materials until all materials of the needed type are exhausted within the assigned burrow. (See Planepacked).
• If a dwarf dies due to failing to complete an artifact, a memorial made to the dwarf will read that the dwarf did create it, despite the failure, and will even list the name of the artifact that never came to be. ^Bug:3640
• When producing an item that is normally made in pairs (gloves, boots, etc.), only a single artifact will be created.

Troubleshooting

Problem: Moody dwarf does not claim a workshop

Solution: Check for highest moodable skill and build the corresponding workshop. If no moodable skills, build a craftsdwarf's workshop. Once magma forges have been built, some dwarves may demand to work at a magma forge. Dwarves can also demand a magma forge even if none of your magma forges have magma beneath them, this will not instantly "fail" the mood like deconstructing a claimed forge but will lead to the moody dwarf sitting around unable to complete his construction, eventually going mad. Note that forbidden workshops cannot be claimed.

Problem: Moody dwarf waits in claimed workshop

Solution: Desired material is unavailable. Determine which material is requested next (materials are collected in the same order as shown in the dwarf's request list), and make some available, if possible. Note that dwarves with preferences may demand a specific type of material (brass bars or yarn cloth, for example). Forbidden and inaccessible materials cannot be collected, nor can material located outside the moody dwarf's burrow.

Problem: Moody dwarf collects base material continually

Solution: The claimed workshop is outside of the dwarf's burrow, resulting in the Planepacked glitch. Add the workshop to the burrow or remove the dwarf from the burrow to finish collecting materials.

Problem: No dwarf has entered a mood for a long time

Solution: Strange moods require at least 20 dwarves; if you have that many you've probably hit one of the two caps. Exploring the caverns can increase the number of revealed tiles very quickly, while crafting goblets will quickly raise your item count; exploratory mining will count toward both caps, simultaneously revealing tiles and producing boulders, though slower than exploring or crafting.