Enialeigh's Storm Arrow (Arteria)

You summon a massive arrow composed of storm clouds and lightning. Choose up to three creatures within range. Make a ranged attack against each target. On a hit, the target takes 8d10 lightning damage and is stunned until the end of its next turn. In addition, a thunderous boom rings out in a 300-foot radius around the target, audible from miles away.

Creatures within 20 feet of the targets must make a Dexterity saving throw or take 4d10 thunder damage, or half on a successful save.

At Higher Levels. For every spell level above 7 select an additional target.