uvae pallium suum

Uvae pallium suum is a spell beyond humanity. It was first created by the gods, to punish their enemies. When cast, the spell shoots towards the target in the form of grape vines. The vines then wrap around the target's head. If they fail to rip the vines off within one turn, they are driven mad and will devour everything and everyone they see, believing them to be grapes. Don't ask how it works.