You conjure swirling, magical vortexes around one creature you can see within range. The vortexes flank the creature and pull it in opposite directions, tearing limbs and flesh. The target must make a Strength saving throw. On a failed save, it takes 3d10 force damage and its speed is halved until the end of its next turn. On a successful save, it takes half the damage and its speed isn’t reduced. Until the spell ends, you can use a bonus action on each of your turns to force this creature to repeat the saving throw, taking damage and reducing its speed as normal. The spell ends early if the target is ever outside the spell’s range.