Vengeful Smite

The next time you make a melee weapon attack against a creature during the spell’s duration, you have advantage on the attack roll if it dealt you damage since the end of your last turn. The next time you hit with a melee weapon attack during the spell’s duration, your weapon hums with necrotic energy, and the attack deals an additional 2d8 necrotic damage, or 2d12 necrotic damage if the creature dealt you damage since the end of your last turn.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d8 for each slot level above 2nd, or by 1d12 for each slot level above 2nd if the creature dealt you damage since the end of your last turn.