Calaun (Vengeance Symbiote)

Amorphous. Calaun can move through a space as narrow as 1 inch wide without squeezing.

Spider Climb. Calaun can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

Amorphous Strength. As long as Calaun is squeezing through a space as narrow as 1 inch wide, he can make a Strength check as a bonus action to pry the space open, increasing the space by 1 inch per his roll.

Symbiotic. Calaun can use an action to be able to bond with a host (described in the attack).

Grappler. Calaun has advantage on attack rolls against any creature grappled by it.

Pseudopod. Melee Weapon Attack: +4 to hit, reach 10 ft., 1 target. Hit: 7 (2d4 + 3) [bludgeoning] damage, 3 poison damage, and the target must make a DC 14 Constitution saving throw or be grappled by Calaun.

Bond. Calaun makes a DC (target's armor class - target's Charisma modifier) Charisma check on a medium humanoid within 6 feet of Calaun. The roll automatically succeds if the target is poisoned or unconcious. On a succes, Calaun bonds with the target and establishes and psychic link between the two. Calaun remains bound to the target until either the target or Calaun or both are completely destroyed in some way. While bound, Calaun grants for 1d6 rounds a regeneration of 5 hit points and an extra attack with bite per round (1d6 piercing+ Strenght modifier + 1d4 poison). The bonder is immune to poison but takes double damage from sonic and fire damage sources. Calaun can also use an action to take control of the bonder's actions and force them to either make an attack, do a saving throw, or to move in some direction.