Akata

Pack Tactics. The akata has advantage on an attack roll against a creature if at least one of the akata's allies is within 5 feet of the creature and the ally isn't incapacitated.

Deaf. Akatas cannot hear. They are immune to spells andeffects that rely on the target’s hearing to function, but they cannot make Wisdom (Perception) checks on sound.

Hibernation. Akatas can enter a state of hibernation for an effectively infinite number of years. Akatas do not take damage from starvation. Should an akata go for 3 or more days without eating, it seeks out a place to hibernate and then surrounds itself with a layer of fibers that quickly hardens into a cocoon made of skymetal known as noqual. An akata remains in a state of hibernation until it senses another living creature within 10 feet or after it is exposed to extreme heat. An akata awakened from its noqual cocoon can claw its way out in 1d4 minutes.

No Breath. Akatas do not breathe, and as such are immune to inhaled toxins (but not odor-based effects).

Salt Water Vulnerability. Due to their bizarre physiology, salt water acts as an extremely strong acid to akatas. Even a splash of salt water deals 1d6 points of damage to an akata, and full immersion in salt water deals 4d6 points of damage per round.
An akata corpse submerged in salt water completely dissolves in 1 minute.

Void Bite. Void Death—bite, Constitution DC 12, incubation period 1 hour, damage 1d3 Dex and 1d3 Con. Should a creature perish while infected, it rises as a void zombie 2d4 hours later.

Multiattack. The clawfoot makes three attacks: one with its bite and two with its tendrils.

Bite. Melee Weapon Attack: +2 to hit, reach 5 ft., one target. Hit: 4 (1d6 +1 plus void death) piercing damage.

Tendril. Melee Weapon Attack: -3 to hit, reach 5 ft., one target. Hit: 1 (1d3) bludgeoning damage.

During Combat. Akatas work together, following thecues of the largest member of their pack and driving foes toward either treacherous footing or strong pack members. Those acting on their own attempt to set up ambushes for their opponents, preferring to pounce from above. Akatas work together to surround their foes and flank enemies whenever possible.

Morale. An akata fights to the death as long as at least one other akata within sight is also fighting.