Turtle Smite

The next time you hit a creature with a weapon attack before this spell ends, the weapon glows with a green energy as the spirit of the Turtle Master inhabits your blade. When you hit a creature with a melee attack with this spell activated, the target must make a Constitution saving throw. On a success the target takes half damage and none of the following effects apply. On a failure, the target takes full damage as well as having its speed halved and being knocked prone.

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.