Entomb

You choose a creature within range to magically construct a coffin around, shutting them inside with overlapping chains. The target must make a Constitution saving throw. On a failed save it is locked inside, stabbed with a thousand blade, and magically dealt 5d12 piercing damage. The coffin welts into shadow and vanishes at the start of the creature's next turn. The creature has total cover while it lasts and can't move or escape by any means other than teleportation. On a success, the creature takes half damage and the coffin vanishes immediately.

An undead that has advantage on saving throws against or is immune to the effects of turn undead has disadvantage it's saving throw against this spell.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d12 for each slot level above 3rd.