Diminutization

Upon the release of magic from another's hands, you thread the weave through their casting as a reaction, siphoning off just enough energy to turn the spell's damage nonlethal. The targeted spell remains able to deal damage and knock creatures unconscious, but becomes incapable of killing creatures or causing them to fail death saving throws. This spell has no effect against Disintegrate.

If you have this spell prepared, you may imbue its effects into the casting of any of your other spells without expending a spell slot as a free action.