Contort

You attempt to warp and contort the body of a creature you can see within range, causing its limbs or other parts of its body to extend, bend, twist, enlarge, or shrink in unusual and excruciating ways. The target must succeed on a Strength saving throw or suffer 4d8 bludgeoning damage. If the target fails its save, it also suffers the following effects for the duration: its speed is halved, its weapon attacks have disadvantage and deal half damage, and it can not cast spells with a somatic component. The target can repeat the saving throw at the end of each of its turns, ending the effect 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 for each slot above 4th.