Burning Fists

The next time you hit a creature with an unarmed attack before this spell ends, Your hand become engulphed in bright red flames. The attack deals an extra 1d4+ CON modifier fire damage to the target. You also gain resistance to fire damage until the spell ends. If you already have fire resistance, you gain fire immunity.

At Higher Levels. The extra damage increases by 1d4 at level 6, 10, and 17.