Flesh Construct - D&D

"Flesh Construct"

A huge quadruped composed of an innumerable amount of fetid, rotting corpses. It has legs built much like a horse's, with large, spiked bone hooves at the bottom. On it's back are two immense tentacles that whip and lash at the surrounding area. The tentacles have a group of five or so upper bodies of people at the ends, and are composed of a long line of people stretching out and holding the next's ankles. It's fat body is interspersed by large staples and rugged rope stitchings over still-open wounds that ooze festering pus. At it's front is a large, disjointed mouth with a slavering tongue fitted between rows of giant, gnashing teeth.

Above the mouth, three intact bodies have clawed their way to the surface. One with menacing fangs and a glimmering red crown. The second is shorter with a flowing, white beard and a simple, obsidian crown. The third is between them, a taller figure with pointed ears and eyes that glow a freezing blue, it wears an elegantly made golden crown.

You all feel hundreds of eyes staring at you, HATING you. Hundreds of souls tied together for a malevolent purpose, and it's goal is your destruction. This may be the end.

Roll for initiative!

Flesh Construct - Chaotic Evil, Huge Monstrosity
189 HP, 14 AC ("natural" armor) SPD 45
STR DEX CON INT WIS CHA
20  7   18  18  11  14  (High intelligence from the wizards used to make it.)
Saves: STR +8, INT +8
Skills: Perception +4, Arcana +8
Languages: Abyssal, Undercommon
Immune: Lightning, Poison damage
Weakness: Psychic Damage (The flaw of many minds in one)

Abilities
Multiattack - The Flesh Construct makes one tentacle and one bite attack.
Bite - 10ft range, +9 hit, 2d10+5 bludgeoning damage. DC 16 DEX/STR check to avoid being grappled by the various arms stuck between it's teeth.

Swallow - Swallows a grappled adventurer. A swallowed adventurer is blind and restrained, and is taking 4d6 acid damage per turn. When 60 damage is dealt to the Flesh Construct, any swallowed adventurers are vomited out.

Tentacle - 50ft range, +9 hit, 3d6+5 bludgeoning damage. DC 16 DEX/STR check to avoid being grappled by the various arms within the tip.

Crush - Restrain a tentacle'd adventurer, and crush them. Deals 2d10 bludgeoning damage.

Tenta-bite - Use the heads in a tentacle to bite at a restrained adventurer. 4d6 piercing damage.

Vomit - Sprays the area within a 40ft cone in front of the Flesh Construct with gastric acid, dealing 2d8 acid damage on a failed DC 15 DEX save, and half as much on a successful one. Also launches any swallowed adventurers 30 feet forward, dealing 1d6 bludgeoning damage if they hit a wall.

Tentacles can be cut off by doing 40 damage directed towards them.