Vorpal

Vorpal is a condition that means the target has been deputized by the gods to fight demons.

Any race or creature can be vorpal, and the condition may be hidden until a demon is nearby. Vorpals can sense demons and attract demon aggro, and grow stronger and angrier the closer they are to demons. They explode if they think they'll lose a fight. They will eventually dissipate and return to the celestial realm after feeding on demon blood.^[1]