This spell creates an undead servant. Choose a corpse of a Monster within range. Your spell imbues the target with a foul mimicry of life, raising it as an undead creature. The spell can create a skeletal or zombie version of a monster with a challenge rating of up to 1.

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 this spell on the creature again before the current 24-hour period ends.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the challenge rating increases by 1 for each slot level above 3rd.