Thundaga

A small glowing orb is launched from your arcane focus to a point you choose within range, upon arriving ignites into a massive column of more than a hundred bolts of lightning. Each creature in a 100-foot-tall cylinder with a 20-foot radius centered on that point must make a Dexterity saving throw. On a failed save, a creature takes 14d10 lightning damage and is stunned until the end of their next turn. On a successful save, it takes half as much damage and isn't stunned by this spell.