Veerstein's Absolute Zero

The water in the target's body starts to freeze solid, slowly restricting their movement and eventually entombing them in their own body. Choose a creature within range. It must make a CON save against your spell save DC. On a failure, the creature takes 10d4 cold damage, and is paralyzed. On a success, the target takes half damage and resists the entombment.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 2d4 for each slot level above 3rd.