Ablative Barrier

Conjuration (Creation) [force]
Level: Alchemist* 2, Artificer * 3, Bloodrager * 2, Magus * 2, Sorcerer */Wizard * 3, Summoner * 2
Components: V, S, M (a piece of metal cut from a shield)
Casting Time: 1 Standard Action
Range: touch
Target: creature touched
Duration: 1 hour/level or until discharged
Saving Throw: Will negates (harmless)
Spell Resistance: no
  Invisible layers of solid force surround and protect the target, granting that target a +2 Armor Bonus to AC. Additionally, the first 5 points of lethal damage the target takes from each attack are converted into nonlethal damage. Against attacks that already deal nonlethal damage, the target gains DR 5/-. Once this spell has converted 5 points of damage to nonlethal damage per Caster Level (maximum 50 points), the spell is discharged.