Argul's Blood Harvester

Cover a crystal ball in the blood of the giants, and use the powers of life force to create the blood harvester. The blood harvester is a sentient humanoid elemental made from blood and serves as your minion. It will absorb the blood within the proximity, whether through corpses, buckets, etc. It CAN'T harvest blood from living creatures. The Blood Harvester can last for an unlimited duration, however it requires a large amount of constant blood to be fed to it. It loses 1 gallon of blood per hour and has a maximum capacity of 20 gallons of blood. If it loses all of its blood, it will perish. It also perishes if this spell is dispelled.

The blood harvester has these stats:

AC: 10
Hit points: 1 gallon of blood = 1d12+spellcasting modifier hit points.
Speed: 30ft (60ft when in liquid form)
Proficiency Bonus PB: Same as spellcaster

STR: 6 | DEX: 10+(1 per gallon of blood) | CON: 20 | INT: Same as you |
WIS: Same as you | CHA: Same as you |

Damage Immunities: Poison, Necrotic
Status Immunities: Exhaustion, Freightened, Stunned, Poisoned
Senses: Blindsight 120ft
Languages: Speaks the same languages as you.

Traits:

Magic Resistance: Advantage on saving throws for magical spells and effects.
Blood Harvest: Can absorb blood from corpses to heal.
Pathogen Carrier: If a corpse that has been consumed carries a contagion, add 1d4 poison damage to all attacks.
Extra Attack: Can attack twice.
Minion: Obeys the command of its creator.

Actions:

Ionic transformation (3/day): Can change between a more solidified humanoid version and a liquid version of blood, one to traverse through small gaps and another for combat. 1 action. Consumes half a gallon of blood per transformation.

Blood Rain (3/day): can launch up to five magical projectiles made of blood, each dealing 1d6 necrotic damage. Auto-hit.

Blood Weaponry: Can turn hands into solidified sharp pieces of blood into different shapes to produce ‘bludgeoning’, ‘piercing’, or ‘slashing’ damage, all dealing 1d8 damage and considered as finesse weapons.

Gift of the Harvest: Can sacrifice self on user’s command to heal 1d12 hit points per 1 gallon of blood to spellcaster, however the spellcaster suffers 5 points of exhaustion afterward.