Cyclonic Rift

Izzet League Spell
Level 8?
Casting Time: 1 Action
Duration: 1 Minute (Concentration)
Range: Self, 80 ft tall, 30 ft radius Cylinder with you at the center
An enormous cyclone erupts with you as its eye. The eye of the storm is a 20 ft radius centered on the caster. Creature within 10 feet of the inner wall are effected. Creatures in the 10 ft thick, 30 ft radius cyclone are effected. Creatures within 30 feet of the outer wall of the storm are effected. Each effected creature must make a STR Saving Throw or be flung 20 feet in a random direction, taking 2d6 bludgeoning damage and being knocked prone. Creatures repeat this saving throw when they end their turn and or enter the range of this spell for the first time on their turn. The cyclonic wall of wind is essentially opaque, creating full cover and heavy obscuration for those in the eye.