Wall of Ice

You create a wall of ice on a solid surface within range. You can form it into a hemispherical dome or a sphere, or you can shape a flat surface made up of ten 10-foot-square panels. When the wall appears, each creature within its area must make a Dexterity save, taking 10d6 Cold damage on failure, half on success.

Damage increases by 2d6 per slot level above 6.