Punishing Armor

Abjuration
Level: Alchemist* 1, Artificer * 1, Bloodrager * 1, Magus * 1, Shaman * 1, Sorcerer */Wizard * 1, Summoner * 1
Components: V, S
Casting Time: 1 Standard Action
Range: personal
Target: you
Duration: 10 minutes/level (D)
Saving Throw: Fortitude negates, see below
Spell Resistance: no

You coat yourself with a thin layer of shimmering energy. Any creature dealing nonlethal damage to you immediately takes half the amount of nonlethal damage dealt. A successful Fortitude Save made by the attacking creature negates this damage.