Crimson Chains

Focusing your intent clearly on a single target, you attempt to draw its blood into sharp needles to pierce its own skin from the inside. The target must make a Constitution saving throw. On a failure, the target takes 3d10 necrotic damage, or half as much damage on a success. On a failed save, the target is also restrained, as these needles become like wires anchoring a target to the ground. The target may repeat this Constitution saving throw at the start of each of their turns, ending this effect on themselves on a success. 

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, you can target one additional creature for each slot level above 3rd.