Spite 2014

You prick your finger and anoint your forehead with your own blood, taking 1 piercing damage and warding yourself against hostile attacks. The first time a creature hits you with an attack during this spell's duration, it takes 3d6 psychic damage. Then the spell ends.

When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 for each slot level above 2nd.