Source: Arcana Unleashed
Level 5 Necromancy (Artificer, Cleric, Warlock, Wizard)
Casting Time: Action
Range: Self
Components: V, S, M (a black lantern)
Duration: 10 minutes
You conjure a floating, ghostly black lantern that hovers above you and sheds Dim Light in a 60-foot radius. When an enemy dies within this Dim Light, a fragment of the creature’s soul flies into the lantern. The lantern can hold a number of soul fragments equal to your spellcasting ability modifier, and those fragments dissipate when the spell ends.
As a Bonus Action, you can expend a soul fragment to create one of the following effects.
Drain Life. The soul fragment darts at a creature of your choice that you can see within 60 feet of yourself. The target makes a Constitution saving throw, taking Necrotic damage equal to 4d8 plus your spellcasting ability modifier on a failed save or half as much damage on a successful one.
Repair Undead. The soul fragment flies into an Undead creature of your choice that you can see within 60 feet of yourself. That creature regains Hit Points equal to 4d8 plus your spellcasting ability modifier.
Ward Ally. The soul fragment darts around a creature of your choice that you can see within 60 feet of yourself. Other creatures have Disadvantage on attack rolls against the chosen creature until the start of your next turn.