Arc Lightning

You point at a creature within range and send a streak of lightning towards them. Make a ranged spell attack against the target. On a hit, roll 2d4 and use the highest number to calculate damage. The target takes the highest of the 2 rolls as lightning damage. For each of the dice that has a match with the highest roll, you extend the damage to that many adjacent creatures to the target.

A creature can be targeted only once by each casting of this spell.

The spell's damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).