You hurl a beam of sizzling, hissing energy directly from the Nine Hells. Make a ranged spell attack against one creature or object in range. On a hit, the target either takes 1d8 Fire damage and has disadvantage on its concentration check against this damage, or 1d8 necrotic damage and subtracts 1d4 from its next attack roll. A creature hit by one or more beams will not subtract from it's attack roll more than once.

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.