Ember Swarm

A swarm of ember hornets enters the fray, aggressively smothering the enemies in their scorching hot bites and stings. The swarm attacks anyone within 10 feet of the main target. Each creature must make a Dexterity saving throw. A creature takes 3d6 fire damage on a failed save, or half as much damage on a successful one.

As a bonus action you can get the swarm to attack a new main target up to 30 feet away.

 At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d6 for each slot level above 1st, or you can increase the swarms reach and radius by 10 feet.