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Gut magic, also called Gastromancy, is the form of magic used by the ogre shamans known as Butchers and Slaughter-Masters. Gut magic simply relies on the caster consuming the correct ingredients and speaking an incantation. If The Great Maw finds them worthy of its blessing it will give the caster and those in proximity to him or her some very powerful effects, though if the caster is unworthy the incantation will produce some less-than-satisfactory results, whether it be completely consuming the caster from inside out to some very powerful flatulence that even Nurgle would be impressed by.
- Warhammer Armies: Ogre Kingdoms (6th Edition), Needs Citation