Alkahest Bombs (Su)
Source: Inner Sea Magic, p. 34
A crypt breaker’s bombs are specially designed to work best against constructs and corporeal undead—two foes commonly encountered in ancient tombs. Known as alkahest bombs, these bombs deal acid damage instead of fire damage. Alkahest is an alchemical fluid that eats away unliving flesh and animated constructs, but it doesn’t work as well against other targets. Against constructs and corporeal undead, alkahest bombs deal 1d8 points of damage, plus 1d8 points of damage for every odd-numbered level instead of 1d6. Against all other creatures, alkahest bombs deal 1d4 points of damage, plus 1d4 points of force damage for every odd-numbered level. This ability otherwise functions as and replaces the standard alchemist bomb class feature.