Grave Betrayal

Golgari Swarm Spell
For the duration, all hostile creatures that drop to zero hit points within range fall under the effect of an Animate Dead Spell provided they are a Medium or Small humanoid.
On each of your turns, you can use a bonus action to mentally command any creature you made with this spell if the creature is within 60 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 is under your control for 24 hours, after which it stops obeying any command you've given it. To maintain control of the creature for another 24 hours, you must cast the Animate Dead spell on the creature before the current 24-hour period ends.

Effect Duration

10 Minutes (Concentration)

Effect Casting Time

Action

Range

60 ft

Level

7th