Storm Sphere

From Xanathar's Guide to Everything, page 166; and Elemental Evil Player's Companion, page 22.

Description
4th-level evocation


 * Casting Time: 1 action
 * Range: 150 feet
 * Components: V, S
 * Duration: Concentration, up to 1 minute

A 20-foot-radius sphere of whirling air springs into existence, centered on a point you choose within range. The sphere remains for the spell's duration. Each creature in the sphere when it appears or that ends its turn there must succeed on a Strength saving throw or take 2d6 bludgeoning damage. The sphere's space is difficult terrain.

Until the spell ends, you can use a bonus action on each of your turns to cause a bolt of lightning to leap from the center of the sphere toward one creature you choose within 60 feet of the center. Make a ranged spell attack. You have advantage on the attack roll if the target is in the sphere. On a hit, the target takes 4d6 lightning damage.

Creatures within 30 feet of the sphere have disadvantage on Wisdom (Perception) checks made to listen.

At Higher Levels: When you cast this spell using a spell slot of 5th level or higher, the damage for each of its effects increases by 1d6 for each slot level above 4th.

Learned By

 * Classes: Sorcerer, Wizard
 * Subclasses: Fighter (Eldritch Knight), Rogue (Arcane Trickster)