True Undeath

This spell creates an undead being, with the same stats as when alive. You must have the targets skull or ribcage in order to complete the spell. The creature is considered it's own entity unless the caster has taken steps to change that,(dm's choice) if controled by player, every long rest the creature makes a Wisdom save against the casters spell dc. 

While under the influence of the caster the creature must obey all commands given by the caster, but otherwise has free will. The creature has all proficiencies it had in life, but has the ablities of a zombie(see zombie rules). 

The creature can use 3rd level necromancy spells, but has no other magic, even if it did in life. Caster can end spell at anytime, creature will exist until hp hits 0.

Creature can relearn spells, equal to 1d6+Int modifier, provided they knew them in life.

Spell is considered permanent if caster dies without ending spell.