Stage 1 Boon: Infernal Smite

Fiend Stage 1 Boon

Once on each of your turns, you can choose one creature you have just damaged with a weapon attack, an Unarmed Strike, or a cantrip. Deal an extra 1d6 Acid, Cold, or Fire damage to that creature, using the same damage type you chose for Fiendish Soul. You can add this damage a number of times equal to 4 plus your Proficiency Bonus, but no more than once per damage roll. You regain all uses of this ability when you finish a Short Rest or Long Rest.

At higher Transformation Stages, you do an additional 1d6 of damage per Transformation Stage, for a total of 2d6 at Stage 2, 3d6 at Stage 3, and 4d6 at Stage 4.