Velith’s Winter Storm

As you hold the glass sphere in your open palm, a fierce swirling blizzard centered on you lashes out at each creature within 60ft of you. 

Each effected creature must make a Constitution saving throw, taking 11d8 cold damage and are restrained on a failed save. On a successful save the creature takes half damage and are not restrained. 
A creature restrained this way or an adjacent creature can use their action to make a Strength saving throw against your spellsave DC to break the ice restraining them. 

At Higher Levels. When you cast this spell using a spell slot of 8th level or higher, the damage increases by 2d8 for each slot level above 7th.