Turma’s Arcane Smite

The next time you hit a creature with a weapon attack before this spell ends, the weapon booms with arcane energy. The attack deals an extra 3d6 force damage to the target. afterwards the target makes an Intelligence Saving Throw. On a failed save the target cannot cast spells until the end of their turn.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the extra damage increases by 1d6 for each slot level above 2nd.