Sword Grave Smite

The next time you hit a creature with a weapon attack before this spell ends, the weapon gleams with astral radiance and blurs as if you are wielding multiple blades as you strike. As your attack hits radiant astral blades rain from the sky, striking your target and those around it. Each creature of your choice in a 10-foot-radius, 20-foot-high cylinder centered on the creature you attacked must make a Dexterity Saving throw. A creature takes 2d6 slashing damage and 2d6 radiant damage on a failed save and half as much on a successful save.

In addition, the ground within this spell’s radius has become covered by radiant blades and is therefore difficult terrain. When a creature first enters the affected area or starts their turn in the affected area they must make a Dexterity Saving throw. They take 1d6 slashing damage and 1d6 radiant damage on a failed save and their movement is reduced to 0 feet. They are unaffected on a successful save.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the extra damage increases by 1d6 slashing damage and 1d6 radiant damage for each slot level above 3rd.