Acid

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Version 0.21: This article is up to date for the latest stable release of Dungeon Crawl Stone Soup.

Acid is a damage type most commonly dealt by jellies and acidic dragonkind, which can be resisted with corrosion resistance. Most types of acid damage can apply a temporary corrosion status, which lowers your AC and slaying.

Sources of Acid

Acidic damage can come from several sources:

Acidic Melee Attacks

The following monsters have acidic melee attacks, which deal acid damage and may apply corrosion:

J Jelly.png Jelly

J Acid blob.png Acid blob

J Dissolution.png Dissolution

J The royal jelly.png The royal jelly

b Caustic shrike.png Caustic shrike

Acid Spit

The following monsters can spit acid as a ranged attack, which bypasses AC and may incur corrosion:

P Oklob sapling.png Oklob sapling: 3d7 (3d3)

P Oklob plant.png Oklob plant: 3d7 (3d6)

D Acid dragon.png Acid dragon:

J Acid blob.png Acid blob: 3d7

d Yellow draconian.png Yellow draconian: 3d7

Acidic Flesh

Some monsters have acidic flesh and will deal acid damage when attacked at close range:

J Jelly.png Jelly

J Acid blob.png Acid blob

J Dissolution.png Dissolution

J The royal jelly.png The royal jelly

Slime Walls

Standing next to the walls of the Slime Pits will cause players and non-jelly monsters to take damage, although it does not cause the corrosion status.

Worshipers of Jiyva are unaffected by slime walls.

Corrosion Resistance

Corrosion resistance reduces damage taken from acid and reduces the chance of being further corroded.

The sources of Corrosion resistance are:

Damage Reduction

Players with corrosion resistance take 50% damage from acid. All monsters with any degree of acid resistance are completely immune to acid damage.

Corrosion

Corrosion is a temporary status effect which gives a stackable -4 to slaying and AC for as long as it lasts. Corrosion will be repaired after enough turns have passed. It can also be removed with Potion of cancellation or Purple Draconian's breath aimed at yourself.

In addition to taking acid damage, players may also suffer corrosion from these sources:

History

Prior to 0.15, corrosion instead caused permanent damage to weapons and armor, reducing their enchantment values, possibly into the negatives. Also, potions of resistance did not grant rAcid or rCorr. There were previously three tiers of acid resistance, each one further reducing acid damage; now there is only one level which is merged with corrosion resistance.