Cryo-Crash

Small crystals fall from the sky stopping mid air as they slowly come together forming a giant ball of frozen pieces. As the ball is forming it takes two turns to fully form amd fall down shattering on the ground Each creature in a 20-foot-radius Sphere centered on that point makes a Dexterity saving throw, taking 6d6 Cold damage on a failed save or half as much damage on a successful one. Some pieces of ice in a 10-foot-radius are stuck in the ground and take one round to melt. Anyone that steps into that radius makes an athletic roll if they get a 12 or higher they don't get damaged but if they fail it they take a 1d4 damage roll.

Using a Higher-Level Spell Slot. The damage increases by 1d6 for each spell slot level above 3.