Blood Armor

You touch a willing creature who isn't wearing armor, and a protective magical force surrounds it until the spell ends. The target's base AC becomes 13 + its Wisdom+Constitution modifier. The spell ends if the target dons armor or if you dismiss the spell as an action.

Breaks after so many hits received.

Halves distance you may move

If augmented adds 1 additional hit taken per spell slot level and removes movement penalty.