Diamond Dust

Sub-zero chunks of ice and rock plummet 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 sphere 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 frozen chunk is affected only once.

The spell damages objects in the area and the chunks shatter, making the affected area difficult terrain for 1d6 rounds.