Player > Feats > Greater Shadow Infusion
The energy of the Shadow Plane suffuses your body, mind, and spirit.
Improved Shadow Infusion, Shadow Infusion, character level 13th.
As a reaction when you take damage, you can become insubstantial and reduce nonmagical kinetic damage you take by 100% and magical or energy damage you take by 50%. This benefit can't reduce damage from effects that deal full damage to incorporeal creatures. You can use this benefit once per day. After that, you can expend 1 Resolve Point to use it again. If your attempt to use this ability fails to reduce the damage you take, you don't expend its use or the Resolve Point.