Elite Martial Undead

The creature of the corpse must have a CR equal to or less than a 1/4 of your wizard level rounded down, it also must be large or smaller. The creature of the corpse cannot be an undead, plant, ooze, elemental, dragon, or construct.

You carve your own insignia onto the corpse, create a chalk circle around the corpse, and with a jewel in hand you create a zombie unlike any other. It becomes undead and its Strength score is changed to 13 unless it has a better score, its dexterity is changed to 8 unless it has a better score, its Constitution is set to 16 unless it had it higher, its intelligence is set to 8 unless it is lower, and its wisdom and charisma is reduced by 4. The undead's HP is half of the original creature plus your proficiency bonus. Decrease it's movement speed by 10 ft to a minimum of 20 ft, it also loses any ability to fly. It loses all damage immunities and resistances, it gains damage immunity to poison. It gains dark vision up to 60 feet and it gains the undead fortitude of the zombie. It losses any ability to use spell casting, but it keeps all other features and actions. It loses any legendary actions, legendary resistances, and lair actions. It keeps all condition immunities and it gains condition immunity to poison. As long as the undead has an intelligence of 8 it can speak any language it knew in life. The undead keeps any proficiencies it originally had. The undead keeps any natural armor it may have had.

You can only control one undead created by this spell at a time, and you must reassert control over it every 24 hours by recasting this spell. If the undead escapes your control it opposes joining the casters party and with all its power it isolates itself from the caster and its allies. You can give a command to this creature alongside any other creature you control using a bonus action. If the undead created by this spell hits 0 HP it reverts back to the original corpse of the creature with the insignia still carved into it.