A spell for removing biological armor — and therefore, in theory, for peeling an alien out of a god.
Named in Crawler Tin's 21st-edition Cookbook note as one of two example spells designed to remove biological armor. Since the gods are Soul Armor and the aliens driving them are wearing them like clothes, a successful cast could in principle strip a deity of its off-world influence — after the invulnerability has been defeated, which is the part nobody has managed. Carl notes he will not be able to use any of this any time soon, and files it away.
A theoretical tool for un-driving a god, recorded in the Cookbook.