Tundra's Ocean Orb

You summon a heavy compact ball of water that hovers near you, as a bonus action on each turn you can fire a ball of water at a target within range.  A creature hit takes 3d6 cold damage, and the hit creature has to make a constitution saving throw before casting there next spell. If they fail the spell does half damage.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.