Cade's Iceball

A bright streak flashes from your pointing finger to a point you choose within range and then shimmers with a low crack into a burst of icy cold energy. Each creature in a 20-foot-radius sphere centered on that point must make a constitution saving throw. A target takes 4d8 cold damage and is covered in ice for 1 minute or until a creature uses its action to break the ice off itself or another creature. A creature covered in ice has its speed reduced to 0. On a successful save, a creature takes half as much damage with no additional effects.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.