Spontaneous Wounding

An evil cleric (or a neutral cleric of an evil deity) can channel stored spell energy into wounding spells that she did not prepare ahead of time. The cleric can "lose" any prepared spell that is not an orison or domain spell in order to cast any inflict spell of the same spell level (an inlict spell is any spell with "inflict" in its name).

Spontaneous Wounding — Kingmaker