Wave’s Iron Maiden

As an action You summon an iron spiked cage to close around and restrain a creature that you can see within range, inflicting 5d10 Piercing damage. The target must succeed on a Strength saving throw or be bound by the cage; if it succeeds, the damage cause by the spell is halved, and the target is able to pry the cage open and escape. On each of the creatures turn while it in the Iron Maiden it takes 2d10 piercing damage and can make a Strength save to escape.

 At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d10 for each slot level above 4th.