Chaos

Version 0.25: This article may not be up to date for the latest stable release of Crawl.

Chaos is a brand that weapons may have. It imitates other brands with each attack producing a random effect.

Possible effects

Chaos-branded attacks randomly choose a brand from the following list:

• Flaming (13.5%)
• Freezing (13.5%)
• Electrocution (13.5%)
• Venom (13.5%)
• Draining (6.75%)
• Vampiricism (6.75%)
• Holy wrath (6.75%)
• Antimagic (6.75%)
• Confusion (2.70%)
• Distortion (2.70%)

or one of a variety non-brand "true" chaos effects, which can be good for you (3.92%)

• Slow (1.96%)
• Petrify (0.98%)
• Paralysis (0.98%)

or good for the defender (8.82%)

• Agility (1.96%)
• Might (1.96%)
• Invisibility (1.96%)
• Berserk (0.98%)
• Haste (1.96%)

or something less easily categorized (0.77%).

• Cloned (0.19%) - 1/6 chance that the clone becomes neutral, 1/6 chance that the clone becomes an ally, 2/3 chance of remaining the same. If the clone is an ally, then the copy is treated as a summon and will time out eventually.
• Polymorphed (0.39%) into similar or higher HD monster
• Turned into a shapeshifter (0.19%) - shapeshifter (2/3 chance) or glowing shapeshifter (1/3 chance)

Additionally, each strike with the chaos brand has a 1% chance to apply the reaping effect to its damage, which has a chance to raise the enemy as an allied zombie depending on the total reaping damage.

Note that hexes produced by this brand don't check MR. The Chaos brand does not pick useless effects (e.g. flaming brand on a fire elemental). Useless effects are removed from the list, and the odds of the other effects increase proportionally.

Also note that gods will disapprove of any effects you might call that offend them (evil effects for the good gods, haste or berserk for Cheibriados, etc.). If you follow a god that disapproves of an effect that chaos can produce, use it at your own risk.

Occurrence

The brand is gifted by Xom at random intervals (though not necessarily to the player), and is wielded by Xom's vault guards and the uniques Crazy Yiuf and (sometimes) Psyche. Some Pandemonium lords and others have this for a base attack. Taking this brand (usually through Yiuf's quarterstaff or by playing as a chaos knight) will give you access to extremely powerful effects very early on that will overwhelm most low level monsters. Just understand that chaos is a fickle mistress, and it is only a matter of time before you berserk an eight headed hydra. Dropping this in favor of a more reliable brand is recommended as soon as possible.

Strategy

Early game, the possible effects that may be caused by this weapon make it undesirable, due to the inability of early game characters to handle such a situation. However, late game, the brand is extremely powerful; the potential to paralyze, slow, petrify, confuse, etc. can make it quite handy in long battles. The hexes it produces don't check magic resistance; you will be even be able to affect demon lords and other normally magic immune monsters, giving it a fantastic synergy with stabbers. Of course, chaos is a fickle mistress; you may be unlucky (which will happen about 10% of the time) and end up hasting the foe, berserking it, or buffing it in some other manner. (Fortunately, many monsters in the late game can already haste themselves, can't go berserk, or are physically incapable of polymorphing, improving its viability a little.)

Of course, that's if you can get your hands on the brand itself. Xom grants it occasionally, but to whom and when is variable. Scrolls of brand weapon have an impressive 3/148 (2%) chance of granting the chaos brand (better chance if your previous brand was more common). Chaos branded weapons are not generated on the floor randomly, and will only be found in the possession of a few uniques and Xom's vault/altar guards.

History

• Prior to 0.25, chaos could inflict random miscast effects instead of the might and agility effects.
• Prior to 0.20, there was a rare chance of healing the target.
• Prior to 0.19, invalid effects could still be rolled with reduced probability.
• Prior to 0.18, ranged weapon ammo could have brands, including chaos brand.
• Between 0.16 and 0.18, chaos brand could move nearby stairs.
• Prior to 0.14, chaos weapons could shaft or polymorph the attacker. Also, gods would forgive the player for disliked effects produced by chaos effects.