Level 3 necromancy
Casting Time: 1 minute
Components: V, S, R, M (a drop of blood, a piece of flesh, and a pinch of bone dust)
Duration: Instantaneous
Range: 10 feet
You target the corpse of an humanoid creature become your choice of a skeleton or a zombie. An undead creature created by this spell is considered tamed by you for 24 hours, it shares telepathy with you, and you can take the Command action telepathically to command it.
You can cast this spell again targeting the undead creature to grant it the tamed feature again for another 24 hours. If you cast this spell on the same undead creature every day for 1 month, the tamed condition doesn't end after 24 hours anymore.
Upcasting: When you cast this spell using a spell slot of 4th level or higher, you animate or reassert control over two additional undead creatures for each slot level above 3rd. Each of the creatures must come from a different corpse or pile of bones.