Undead Ally

You call forth a spectral ally from beyond to aid you in combat appearing in an unoccupied space within range and lasting for the duration or until you cast this spell again. Make a ranged spell attack against a target within 60 feet of the spirit. On a hit, the target takes 1d6 plus your spellcasting ability modifier necrotic damage.

As a bonus action on subsequent turns, you can move the spirit up to 20 feet and make another ranged spell attack.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, you summon an additional spirit for every two slot levels above 2nd. You can control all summoned spirits using the same bonus action.