Craft undead

Drawing upon your knowledge of the necromantic arts, you use your magical power to create and raise a small or medium humanoid undead creature which is permanently under your control. As a bonus action on your turn, you may give the undead creature you created a command (I.E Attack, defend, sit, stay, etc) Of which the undead will, to the best of it's ability, will complete the task or command given. The following choices of undead creatures to create are available to the caster depending on how many corpses they sacrifice:

1 corpse- Sacrificing a singular corpse raises a zombie the basic undead

2 corpses- Sacrificing two corpses creates a ghoul a more advanced undead

3 corpses- Sacrificing three corpses has the chance of raising all three corpses as skeletons or raising two of the corpses as ghouls.

You may only control to a total CR rating of 5 or less of these undead creatures created this way. Should you control other undead not created by this spell they do not count towards the total CR rating of undead creatures created this way. Should you control more than a total of CR rating 5 then undead creatures created this way, randomly or the DM's choice, will immediately be destroyed until the challenge rating returns to a value less than 5.

At higher levels: If you cast this spell with a sixth level spell slot you may create a small or medium undead creature you've seen before with four or more small or medium corpses (The DM chooses how many corpses needed to raise this undead.) Additionally this undead creature can be the only undead creature, created by this spell, permanently under your control; unless the creature has a CR rating of 3 or less. Similarly to the other undead creatures created by the lower levels of this spell you may give the undead creature created this way a command and the undead creature will, to the best of it's ability, complete said command. This new undead creature counts toward the total CR rating of the spell limits. Should this creature's CR rating exceed the threshold this creature is destroyed immediately