Crackle

You create three arcs of lightning striking targets in range. You can direct them at one target or several.

Make a ranged spell attack for each arc. On a hit, the target takes 1d12 lightning damage. If three or more arcs hit a single target, they must make a Constitution saving throw or become shocked, stunning them until the start of their next turn.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you create one additional ray for each slot level above 2nd.

Source: Kibble's Generic Elemental Spells