The Wild Magic Compendium

GODEATER - The game of exploration and transmutation in post-apocalyptic fantasy world of dead divinities - is now here in Version 2.0! Get the core rules here, completely free! Or just use this book in a system of your own - they're trivially easy to convert.

The Wild Magic Compendium is a treasure trove of random magic effects, mutations, and strange magical entities, designed to give GMs easy ways to throw consequences and complications into their adventures. It includes:

• 100 Unique and characterful magical miscast effects, graded by severity and ranging from a rain of ancient coins to summoning the manifestation of death itself. 
• 100 Unique mutations, little quirks that a character might slowly accumulate as they explore irradiated god-entrails - or whatever weirdness is present in your own game setting.
• A system for performing magic through communion with local animistic spirits, turning magic into a game of diplomacy and historical research.
• A system for summoning demonic Principalities from the Dreg planes - if you can control them, of course.