Void Kraken

1x Void Kraken Huge monstrosity , chaotic neutral
Armor Class 15 Natural Hit Points (25d12 + 75) Speed 15 ft., climb 15 ft.
STR 20 (+5) DEX 8 (-1) CON 16 (+3) INT 8 (-1) WIS 17 (+3) CHA 5 (-3)
Saving Throws STR +9, CON +7 Skills Perception +6 Condition Immunities Blinded, Grappled Senses Tremorsense 50 ft, Passive Perception 16 Languages -- Challenge 12 (8,400 XP) Proficiency Bonus +4
Outer Tentacles. The Void Kraken has at most 5 outer tentacles that extend to a maximum of 50 ft from the maw. Outer tentacles have 20 hit points (separate from the maw's overall health). Each time an outer tentacle is destroyed the maw suffers 5 points of damage.
Maw. The center of the Void Kraken is a giant toothed maw. This part of the creature is represented by the monster's hit points. If the maw is not destroyed, the creature is still alive.
Actions Multiattack. The Void Kraken makes an attack with each of its intact tentacles and its maw or it uses its Confounding Mist.
Confounding Mist(Recharge 5-6). The Void Kraken emits a fine mist from its maw. The mist hovers in the air for one round and affects a 30 foot sphere around the maw. The area is heavily obscured and each creature who enters the affected area must succeed on a DC 15 CON saving throw or be under the effects of the Confusion spell. Affected creatures can make a new saving throw at the end of each turn. If a creature succeeds their saving throw, they are immune to this effect for 24 hours.
Tentacle Attack. Melee Weapon Attack: +9 to hit, reach 50 ft., 1 target. Hit: (2d6 + 5) bludgeoning damage. Target is grappled (escape DC 15 DEX) and restrained until the grapple ends.
Maw Attack. Melee Weapon Attack: +9 to hit, reach 5 ft., 1 target. Hit: (3d8 + 5) piercing damage. Creatures who were grapple by the Void Kraken and then hit with a Maw Attack are swallowed. Swallowed creatures are restrained and take (3d6) Acid damage at the beginning of each turn. When the Void Kraken takes damage, it must succeed on a DC 15 CON saving throw or regurgitate any swallowed creatures.