Arachnopent Hatchling

Web Walker. The Arachnopent ignores movement restrictions caused by sticky webbing.

Tight Hold. If the Arachnopent Hatchling has a target constricted for two rounds, the target begins to suffocate and blood flow is reduced around the neck.  The constricted target must make a DC 14 Constitution saving throw at the beginning of the third round.  The DC increases by one for each round after the third. The target falls unconscious after three failed saves.

Maturation. If the Arachnopent Hatchling lives within a creature, living or dead, for 5 days, it will begin to claw its way out and emerge as an Arachnopent Adolescent.  The creature, if living, must make a DC 16 Constitution saving throw, dropping to 0 hit points and immediately fails one death saving throw on a failure.  On a successful save, the creature takes 16 (4d8) piercing damage.  At any point prior to its maturation, the Arachnopent Hatchling can be destroyed from within by use of Lesser Restoration or similar magic.

Bite. Melee Weapon Attack: +3 to hit, reach 5 ft., one creature. Hit: 6 (2d4 +2) piercing damage. On a hit, the target must make a DC 15 Constitution saving throw. On a fail, the target takes 1d6 poison damage and are considered poisoned.  On a success, the target takes half as much and is not poisoned.

Constrict. Melee Weapon Attack: +3 to hit, reach 5 ft., one creature. Hit: 6 (2d4 + 2) bludgeoning damage and the target is blinded as the Arachnopent Hatchling wraps its tail around the target's neck and covers its face.  The target may use their action to attempt to wrench the Arachnopent from its neck by succeeding on a DC 16 Strength check. Upon a successful constrict action, the Arachnopent may make a bite attack at advantage.

Burrow. As an action, the Arachnopent Hatchling may crawl into an unconscious creature's mouth and burrow into its body.  So long as the Arachnopent Hatchling is inside the body of a living creature, that creature is considered to have one point of exhaustion that cannot be removed until the Arachopent is removed or killed.

Slippery and Slithery. If a creature within five feet of the Arachnopent makes an attack against it, it may choose to swiftly move up to five feet away without provoking an attack of opportunity, avoiding the attack.  This must be declared before the result of the roll is known.  If it has a creature grappled via its constrict attack, that creature is no longer considered grappled.