Excision of Souls

You hurl a shrieking bolt of necrotic energy towards a creature within range. Make a ranged spell attack against the target. On a hit, the target takes 3d8 necrotic damage, the bolt then targets another creature within 15 feet, and will deal 2d8 necrotic damage. The bolt can continue hitting creatures and loses 1d8 die of damage down to a minimum of 1d8 dice. As long as there is a creature within 15 feet the bolt will continue to ricochet. For every creature hit heal 1d4 Hit Points with a max cap of dice rolled equal to the level at which the spell was cast.