Contort

You attempt to warp and contort the body of a creature you can see within range in an excruciating way. 

The target must succeed on a Strength saving throw or take 4d8 bludgeoning damage. If the target fails its saving throw, its speed is halved, its weapon attacks are made with disadvantage and deal half as much damage on a hit, and it cannot cast spells with a Somatic component. A target can repeat its saving throw at the end of each of its turns, ending the effect on itself on a success.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d8 per level of spell slot above 4th.