Explode

The user places a hand on the enemy with gunpowder in the other, summoning an explosion that engulfs both and everything around them. Forcing both to roll a saving throw, a 1 being instant vaporization, 20 being no damage taken, between 15 and 19 reducing damage by 6 per number above 15 along with halving it beforehand, between 10 and 15 doing half damage, and between 2 and 10 adding 5 damage per number below 10