Eldritch Impact

An orb of crackling energy forms around your hand giving you a 1d8 of force damage to your unarmed attack. On a successful strike the creature must make a STR saving throw or be knocked prone.

At higher levels the spells damage dice increases to 2d8 at 5th level, 3d8 at 9th level, 4d8 at 14th level, and 5d8 at 17th level.