You call upon the primal fury of the storm, unleashing a devastating surge of lightning, thunder, and wind upon your enemies. A swirling tempest forms in a 30-foot-radius sphere centered on a point you choose within range. The tempest roars with thunder and crackles with lightning, striking fear into those caught within its fury. When you cast this spell, a bolt of lightning strikes down at a point within the sphere. Each creature within the sphere must make a Dexterity saving throw. A creature takes 10d10 lightning damage on a failed save, or half as much on a successful one.
Storm's Fury (Ongoing Effect):
At the start of each of your turns while you concentrate on this spell, you can choose one of the following effects:
Thunderous Roar: Each creature of your choice within the sphere must make a Constitution saving throw. On a failed save, they take 4d8 thunder damage and are deafened until the end of your next turn. On a successful save, they take half damage and are not deafened.
Lightning Surge: A bolt of lightning arcs through up to three creatures of your choice within the sphere. Each target must make a Dexterity saving throw, taking 5d10 lightning damage on a failed save, or half as much on a successful one.
Gale Force Winds: Powerful winds surge within the sphere. Each creature of your choice must succeed on a Strength saving throw or be pushed 15 feet away from the center of the sphere and knocked prone. Flying creatures have disadvantage on this saving throw.
Difficult Terrain: The area within the sphere becomes difficult terrain as winds and debris hinder movement. Creatures must spend 2 feet of movement for every 1 foot they move within the area.
At Higher Levels: When you cast this spell using a spell slot of 9th level, the damage increases by 1d10 for the initial burst and ongoing lightning effects.