Bamboostalker

Arachnid movement. The Bamboostalker can move seamlessly through the forest giving it a natural advantage on stealth rolls outside of combat.

Canopy ambush. When in the forest, the creature is an ambush predator using its legs to hide it's body above the canopy. If the stalker is unseen when it strikes, it has advantage on the Tendril  action on unsuspecting prey and immediately Abduct them.

Forest Walker. The spider ignores movement restrictions caused by naturally occuring difficult terrain in a forest biome.

False appearance. When standing still, it's legs are indistinguishable from regular bamboo trees.

Multiattack. The Bamboostalker makes 2 attacks with it's Piercing legs or claws, one web attack, one tendril if it is available and one bite.

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one creature. Hit: 11 (1d8 + 7) piercing damage, and the target must make a DC 11 Constitution saving throw, taking 9 (2d8) poison damage on a failed save, or half as much damage on a successful one. If the poison damage reduces the target to 0 hit points, the target is stable but poisoned for 1 hour, even after regaining hit points, and is paralyzed while poisoned in this way.

Pincers. Melee Weapon Attack: +7 to hit, reach 5 ft., one creature. Hit: 15 (2d8 + 7) Piercing damage.

Web (Recharge 5–6). Ranged Weapon Attack: +5 to hit, range 30/60 ft., one creature. Hit: The target is restrained by webbing. As an action, the restrained target can make a DC 14 Strength check, bursting the webbing on a success. The webbing can also be attacked and destroyed (AC 10; hp 5; vulnerability to fire damage; immunity to bludgeoning, poison, and psychic damage).

Piercing legs. Melee weapon attack: +7 to hit, range 30 ft., one creature. Hit: 16 (3d6 + 7) Piercing damage.

Tendril. Melee Weapon Attack: +7 to hit, reach a 15ft circle directly underneath the stalker's body, one create. Hit: The target is Grappled (escape STR DC 15. Until the grapple ends, the target is Restrained and has disadvantage on Strength Checks and Strength Saving Throws, the stalker cannot use it's tendril again until it drops it's prey or successfully swallows them.

Abduct. At the end of each turn, the Bamboostalker pulls a Grappled creature 20 ft. towards it's mouth.

Strike and dodge. The Bamboostalker can rapidly pull up it's legs as long as it can reasonably maintain it's balance when the legs are struck by slashing, piercing or bludgeoning attacks.

Death Thows. When in mortal danger, the bamboo stalker will quickly stomp around, using all of it's legs (8 Piercing legs)  in quick succession in a last attempt to defend itself.

Piercing legs. Melee weapon attack: +7 to hit, range 30 ft., one creature. (3 times/round)

Web (Recharge 5–6). Ranged Weapon Attack: +5 to hit, range 30/60 ft., one creature. Hit: The target is restrained by webbing. As an action, the restrained target can make a DC 14 Strength check, bursting the webbing on a success. The webbing can also be attacked and destroyed (AC 10; hp 5; vulnerability to fire damage; immunity to bludgeoning, poison, and psychic damage).