Cage of Bones

You create a cage made of shifting bones, with spikes around a target and it must roll a successful Dexterity saving throw or becomes caged with the spell. When caged, your target is restrained, and takes 2d4 piercing damage from the bone spikes. Being in the cage is painful and targets generally cry-out in agony. If the saving throw is successful, the target is nething restrained nor takes any damage.

Cage of bones can be destroyed; it has 40 hp and 10 AC.