Dark Lightning

You thrust out your hands, unleashing a deadly coil of lightning infused with wrathful hate towards a creature you can see within range. The target must make a Constitution saving throw. If they fail, they take [roll]2d8[/roll] necrotic damage. If the target is below their maximum hit points, the lightning forks to another creature of your choosing within 10 feet of the target. This new target must make their own Constitution saving throw, taking [roll]2d8[/roll] necrotic damage if they fail. This process can repeat up to three times, and the same target cannot be affected twice. If a target succeeds on their saving throw and is below their maximum hitpoints, they take [roll]1d8[/roll] necrotic damage instead.