Wait, porn aside, it never occurred to me till seeing this how actually overpowered the "eat slugs" spell is. Even if you're not killing someone like with Avada Kedavra they are still down for the count for a considerably long time.

Base +6, mnoi +6, windshadowscp +6

some views suggests that it's not materialising real slugs (or turing your intestines to slugs) in your digestive tract as it would violate the Gamps law of transfiguration.

Presumably it's creating magic made slugs in your throat which crawls out. It blocks the ability to cast spells and breaks concentration (which is better than langlock). But can be removed easily by a counter spell like finite incantartum

Base +6