Tartarean Tomb

You create a battering storm of rune-scribed black iron plates which quickly assemble into a coffin-like prison of iron and shadow around one creature that you can see within range. The target must succeed on a Dexterity saving throw or take 5d10 bludgeoning damage and be entombed. A creature that succeeds on its saving throw takes half as much damage and isn’t entombed. While entombed, the creature is blinded and restrained and it has total cover against attacks and other effects outside the tomb. An entombed creature can use its action to make a Strength check against your spell save DC. On a success, it frees itself.