Aleth Skinfuser

Technologically Advanced. Aleth can attune to 6 magical items and gains +1 to each saving throw he makes for each magical item he's attuned to. Additionally, if he is reduced to 0 hp, he can choose to end his attunement to one of his magical items, and instead be dropped to 1 hp. Lastly, magic items Aleth has in his stat block do not count as magical items and do not give a magical aura, and when Aleth casts spells they do not register as magic spells.

Technology Possession. Aleth is attuned to a Helm of Awareness (Can't be surprised and has advantage on Initiative Rolls), Arcane Propulsion Armor, Necklace of Adaptation (Adv against saving throws made against harmful gases and vapors, and can breath normally in any enviroment), Gloves of Missile Snaring, Cloak of Protection (+1 to AC and all Saving Throws), and Belt of Hill Giant Strength (21 Strength).

Spell Storing Item. Aleth carries and can give a creature an item of Enlarge/Reduce. As an action, a creature holding the item can cast Enlarge/Reduce. Once Enlarge/Reduce has been casted 10 times the item can't cast it anymore until a long rest is taken.

Tech User. Aleth is a 20th-level spellcaster. Its Tech User ability is Intelligence (spell save DC 19, +11 to hit with spell attacks). Aleth has following Artificer spells prepared:
 Cantrips (at will): Memory Imprint, Poison Spray, Acid Splash, Shocking Grasp
 1st level (4 slots): Chaos Bolt, Sanctuary, Catapult, Cure Wounds, Detect Magic
 2nd level (3 slots): Arcane Lock, Warding Bond, Alter Self, Spider Climb, Lesser Restoration, 
 3rd level (3 slots): Glyph of Warding, Summon Lesser Demons, Haste, Fly, Dispel Magic, Tiny Servant
 4th level (3 slots): Death Ward, Lemonond's Secret Chest, Mordenkainen's Private Sanctum, Summon Construct, Stone Skin, 
 5th level (2 slots): Animate Objects, Awaken, Bigby's Hand, Transmute Rock, Wall of Stone, 

Power Fist. Melee or Ranged (20/60) Weapon Attack: +11 to hit., 1 target. Hit: 11 (1d8 + 5) Force damage.

Unsettle Flesh. Melee  Weapon Attack: +11 To hit, 1 target. Hit 15 (3d8) necrotic damage and the target must make a DC 19 Constitution Saving throw or have disadvantage on Saving Throws, Ability Checks, and Attack Rolls for one minute. A creature effected by this can remake the save at the end of their turns. This counts as a Poison Effect.

Overhaul. Aleth targets a creature he can touch within 5ft of him, the target makes a DC 19 Constitution save. If the target is affected by Unsettle Flesh and has lower than 50 hit points, the target is killed and Three-Quarters of their body explodes. If Aleth targets himself, he automatically explodes regardless of his HP or being affected by Unsettle Flesh

Flash of Genius (5/Long Rest). Aleth can add +5 to an ability check, saving throw, or attack roll, that he or a creature within 30ft him makes.

Stay Alive. If a creature within 60ft of Aleth drops to 0 Hp, Aleth can instead have them drop to 1 Hp. The creature then has disadvantage on attack rolls, saving throws, and ability checks, and imust make a DC 19 Wisdom Saving Throw or be under complete control of Aleth.

Aleth can use 3 Legendary Actions per round.

Remade (Costs 1 Actions). One dead ally is revived as a Husk Zombie if it's been dead for less than 1 round. Each size category above medium summons 3 extra Husk Zombies. 

Quick Item (Costs 1 Actions). Aleth uses a Cantrip.

Flesh Fuse Gauntlet  (Costs 2 Actions). Aleth uses either Unsettle Flesh or Overhaul

Villain Actions. On each round at the end of another creature's turn Aleth can take a villain action.
 Round 1, "Bring Me Their Bodies!" - Allies of Aleth can move without provoking Attacks of Opportunity and make one melee attack.
 Round 2, "Get Yourselves Together!" - Allies of Aleth heal 20 Hp and make one melee attack. 
 Round 3, "ABSORB THEM!!!" - Allies make 2 attacks, and if both attacks hit the target is restrained and takes 2d8 necrotic damage at the start of each of their restrained turns. A restrained target can make an Athletics check as an action to escape, acting as a grapple.