Artillery Pestilence Freeze

You unleash multiple bolts of ice arcing towards a spot in range. The ice freezes a 75-foot radius and every creature not immune to cold must make a Dexterity saving throw. A fail takes 9d8 cold damage, a success takes half damage. The creatures takes half of that damage when they start they're next turn.

Casting this spell reduces your walking speed by 5 feet for 1 hour every other casting.

At Higher Levels. When you cast this spell using a spell slot of 7th level or higher, the damage is increased by 2d8 for each slot level above 6th.