Thundercloud

A dark, menacing cloud booming with thunder and lightning appears in a 20-foot-radius sphere centered on a point within range. The cloud lingers in the air for its duration.

When the cloud appears, each creature in it must make a Dexterity saving throw. A creature takes 5d8 lightning damage and is deafened, or half as much damage if successful. The creature is deaf so long as it remains within the cloud's area, but recovers without a save when they leave it.

The cloud moves 10 feet directly away from you in a direction that you choose at the start of each of your turns.