Crismon Smite

The next time you hit a creature with a melee weapon attack during the spell’s duration, your weapon flares with Crimson Blood Fire. The attack deals an extra 2d6 necrotic damage to the target and causes the target to make a Constitution saving throw. On a failed save, it takes extra 1d6 necrotic damage.

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 1d6 for each slot.