A thin, light blue bolt of lightning sparks from you toward a creature within range. Make a ranged spell attack against the target. On a hit, it takes 1d8 lightning damage, and on a critical attack roll, the creature is stunned until the start of your next turn. Additionally, if this attack hits, roll with disadvantage to hit a target within 15 feet. This chain reaction can happen for as long as each hit is successful.

The spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).