From Dungeons of Dredmor Wiki
This powerful acid burns flesh and armour alike.
Duration: 5 turns
Secondary effect: -4 -1 -1 -1 and causes bleeding
This spell is currently a side-effect of certain Traps, drinking some alchemical reagents, one possible result of drinking from a Fountain and can be an enchantment on an Artifact weapon. It is the secondary effect of the Acid Ampoule Bolt.