Chainbolt Eldritch Blast

You hurl a beam of crackling energy. Make a ranged spell attack against one creature or object in range. On a hit, the target takes 1d10 Lightning damage.

Effect: When a beam hits, it may arc to a second creature within 15 feet of the first for half the beam’s damage. The arc does not trigger additional arcs. Choose the secondary target when the beam hits.

Cantrip Upgrade. The spell creates two beams at level 5, three beams at level 11, and four beams at level 17. You can direct the beams at the same target or at different ones. Make a separate attack roll for each beam.