Deep Soul Dregs

Four dark souls are summoned forth from the ground and take the form of white eyed, black orbs. They hover above you like a crown and keep a silent watch. You can use a reaction to fire any number of the four dark orbs when one or more creature(s) of your choice enters within 30 feet of you. Make a ranged spell attack against the creature(s) for each orb you fire. On a hit the creature takes 1d4+1 necrotic damage. If you cast this spell in a graveyard, battlefield or anywhere that the dead might be abundant (at the DM's discretion), you gain 2 additional orbs for a total of 6.

At Higher Levels.  When you cast this spell using a 2nd level spell slot or higher, the necrotic damage increases by 1d4+1 for each slot level above 1st.