Tetraglacial Torpedo

You form a massive, jagged, prism of black ice that cracks into four oblong pieces. It plummets to the ground at four different points you can see within range. Each creature in a 40-foot-radius sphere centered on each point you choose must make a Dexterity saving throw. The effect spreads around corners. A creature takes 20d6 cold damage and 20d6 bludgeoning damage on a failed save, or half as much damage on a successful one. A creature in the area of more than one icy burst is affected only once.

The spell damages objects in the area and freezes appropriate liquids that aren't being worn or carried (similar to and including water, where unoccupied by a creature). It also extinguishes fire.