True Animation

This spell creates an undead servant. Choose a pile of bones or a corpse of any creature within range. Your spell imbues the target with a foul mimicry of life, raising it as an undead creature. The target becomes a skeleton if you chose bones, reduce its max hit points by 1/4 of it's original amount. If you chose a corpse reduce its armor class by 1/4 of its original.

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 permanently unless your hit points reach the single digits in which case the creature will lose 1/4 of its hit points every turn, or the creature is brought to a state where regeneration is impossible. 

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, when you animate a creature to a skeleton it's speed increases by 1/4 its original amount aswell as only losing 1/8 its original armor class, when you animate a creature to a zombie it's max hit points increase by 1/8 its original amount aswell as only losing 1/8 its original armor class.