Anders's Create Greater Undead

You can cast this spell only at night. Your spell summons spirits from the beyond to aid you. You summon two ghosts, two banshees, one wraith, or one vampire spawn. For each undead created, one small or medium humanoid corpse must be within range for the entire casting, and the undead is summoned above the corpse (ghosts, banshees, wraiths), or created from the corpse (vampire spawn). The creatures are under your control.

As a bonus action on each of your turns, you can mentally command any creature you animated with this spell if the creature is within 120 feet of you (if you control multiple creatures, you can command any or all of them at the same time, issuing the same command to each one). You decide what action the creature will take and where it will move during its next turn, or you can issue a general command, such as to guard a particular chamber or corridor. If you issue no commands, the creature only defends itself against hostile creatures. Once given an order, the creature continues to follow it until its task is complete.

The creature remains under your control indefinitely. If you use this spell to summon creatures again while any creatures previously created are still alive, the previous creatures are instantly destroyed.

At Higher Levels. When you cast this spell using a 9th-level spell slot, you can create three ghosts or banshees, or two wraiths or vampire spawn.