The necromancer performs exceptionally visceral surgery on a Medium or smaller undead or a humanoid corpse to bind and configure the gem to the target and make them an intelligent undead creature.   The target must have either no Intelligence score or an Intelligence of 6 or less. It gains an Intelligence score of 10 and learns one language that the caster knows. Its Wisdom and Charisma scores also increase to 10 if they are not already 10 or higher. The hit points of the undead increase by the profiecinecy bonus of the necromancer and its AC improves by half of the necromancers proificency bonus (rounded down)   The DM chooses statistics appropriate for the awakened undead, such as the statistics for a skeleton or zombie, except with changes as previously noted.   The awakened creature is charmed by the necromancer for 1 week, or until the necromnacer or zis companions do anything harmful to it. When the charmed condition ends, the awakened creature chooses whether or not to remain friendly to the necromancer, depending how it was treated by the necromancer while it was charmed.   The necromancer cannot perform this spell again until either it is a week since the first time the spell was cast or the undead is destroyed.