Eldritch Smite

The next time you hit a creature with a melee weapon attack during the spell’s duration, your weapon distorts through an invisible force, and the attack deals an extra 1d8 force damage to the target and causes the target to be pushed back 5 ft.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the initial extra damage dealt by the attack increases by 1d8 for each slot.