Brin the Flesh

Necrotic Absorption. Whenever Brin is subjected to necrotic damage, it takes no damage and regains a number of hit points equal to the necrotic damage dealt.

Amalgamate Form. Brin is a mass of different bodyparts and creatures. There are five parts of Brin. But only the body can move 30 ft independently. The specific parts need to form from blood pools, which are created by the body. . Each is a Large Undead. They all share hp, and have different abilities listed in (form) such as (Head) Bite. Roll initiative for Brins segments separately

Brins Heart. The Heart of Brin has 10 AC, and vulnerability to Slashing, Piercing, Bludgeoning damage. 

Brins Maw. The Head of Brin has +2 strength but -2 Dexterity compared to other parts. (15 AC)

Eldrich Resistence. Brins body is resistent to magical damage, piercing, bludgeoning and slashing damage. (16 AC)

Brins Tentacle. Formed from the lower half of a pig, the formless tentacle has a reach of 15 feet, and +2 Dex / -2 Str (17 AC)

Brins Spine. A spire of bone and muscle, the Spine has Resistance to Slashing, Bludgeoning, and Piercing damage. (18 AC)

Psychic Blood Screech (Recharge 5-6). Hundreds of mouths and heads lead out a massive psychic scream, coming from Brins body. Up to 5 creatures within 90ft of Brin have to make an Intelligence saving throw (DC14), On a failed save, a target takes 10d6 psychic damage and is stunned. On a successful save, a target takes half as much damage and isn´t stunned. The Recharge is blocked, if the Heart has taken damage in the same turn.

Multiattack. Brin makes five attacks. three of which are made by the parts while 2 are made by the Body. Before healing once through the Heart.

(Head) Bite. Melee Weapon Attack: +7 to hit, reach 10ft., one target. Hit 16 (4d6 + 7) Slashing damage. Creatures must make a DC18 Constitution saving throw, or start bleeding profusely. A creature bleeding by this effect takes 1d6 Slashing damage at the start of each of their turns, and can use a Bonus Action to attempt to stop the bleeding with a DC18 Constitution save or Medicine check. Another creature that is Adjacent to a bleeding creature can attempt the same Medicine check as an Action.

(Tentacle) Poisoned Spike. Ranged Weapon Attack: +7 to hit, reach 120ft., one target. Hit 16 (2d6 + 5) Piercing damage. Targets must make a DC18 Constitution save or take 2d6 Poison damage, and be Poisoned until the end of their next turn.

(Spine) Stunning Slam. Melee Weapon Attack: +7 to hit, reach 15 ft., one target. Hit: 13 (3d8 + 6)
Bludgeoning Damage. Creatures struck must make a DC18 Constitution saving throw or be Stunned until the end of their next turn.

(Heart) Heal. The Formless Flesh heals for 2d8 .

(Body) Slam. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (3d8 + 6) bludgeoning damage. If Slam hits, hit a Medium or smaller target, the target is grappled (escape DC 18), and Brin uses its Engulf on it.

(Body) Engulf. Brin engulfs a Medium or smaller creature grappled by it. The engulfed target is blinded, restrained, and unable to breathe, and it must succeed on a DC 18 Strength saving throw at the start of each of the mound's turns or take 13 (3d8 + 5) bludgeoning damage. If Brin moves, the engulfed target moves with it. Brin can have only one creature engulfed at a time.

(Shared) Morph. Two of Brins parts swap places

Fleshcurling Counterspell. Multiple heads utter a dreadful words coming from Brins Body to interrupt a creature it can see that is casting a spell. If the spell is 4th level or lower, it fails and has no effect. If the spell is 5th level or higher, Brin makes an Intelligence check (DC 10 + the spell’s level). On a success, the spell fails and has no effect. Whatever the spell’s level, the caster takes 10 (3d6) psychic damage if the spell fails.

(Heart) Heal. The Formless Flesh heals for 2d8 .

(Shared) Morph. Two of Brins parts swap places