Catastrophic Magic details a more flexible magic system where there's no more need to keep track of the number of castings per spell. Instead, it introduces a casting roll. Fail the roll and you might face catastrophic consequences.

This supplement also details modified rules for the existing magic rules, a new set of talents for magicians that want to embrace the nature of catastrophic magic, new spells to force the catastrophe onto others, and new trinkets and relics.