Bloodbeast

Amorphous. The Bloodbeast can move through spaces as narrow as 1 inch without squeezing.

Hybrid Nature. The Bloodbeast has two creature types: humanoid and aberration. It can be effected by an effect if it works on either of these types.

Made from Blood. Whenever a creature is reduced to 0 hit points within 10 feet of Bloodbeast, Bloodbeast regains hit points equal to twice the creatures number of maximum hit dice, provided the creature has blood.

Claw. Melee Weapon Attack: +6 to hit, reach 5 ft., 1 target. Hit: 2d6+3 (1d6 + 3) [Slashing] damage, and the target must succeed on a DC 12  constitution throw or take 2d8 necrotic damage and cannot gain life for five turns. A creature that succeeds on the saving throw takes half the damage and can still gain life.

Extract Blood (1 per day). Dc 15 constitution save, range 30 ft. Hit: 7D6 (7d6) [Necrotic] damage. Bloodbeast magically pulls on the vitality of creatures around it. Each creature of Bloodbeast's choice within 30 feet must succeed on a DC 15 constitution saving throw or take 2d8 necrotic damage, and Bloodbeast gains up to half its life. On a successful saving throw, that creature takes half as much damage. Creatures that have no blood is immune to this effect.

Heal Ally. Bloodbeast may heal its ally by removing any number of its own hit points. The target will gain life equal to the hit points removed from Bloodbeast.

Multi-Attack. Bloodbeast can make up to 3 claw attacks

Morph. May morph into a puddle to avoid melee attacks. The attacker must succeed on a DC 14 dexterity check to deal the melee damage.

Can only be activated once per day and can be activated as a reaction.

Blood Drain (Costs 2 Actions). Bloodbeast chooses up to one target. that creature must succeed on a DC 18 constitution saving throw or take 4d10+11 necrotic damage, then any number of target creatures within a 50 ft radius gains that much life.