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

Web Sense. While in contact with a web, the spider knows the exact location of any other creature in contact with the same web.

Web Walker. The spider ignores movement restrictions caused by webbing.

Swarm Slayer. If surrounded by more than one enemy, the spider can make up to two additional leg attacks as a bonus action after taking the attack, multiattack, or web action. Each additional attack must target a different creature, and cannot target a creature who was targeted by the attack, multiattack, or web action on the spider’s turn.

Multiattack. The spider makes three attacks: one with it’s bite and two with it’s legs.

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft, one target. Hit: 17 (3d8+4) piercing damage, and the target must make a DC 15 Constitution saving throw, taking 27 (6d8) poison damage on a failed save, or half as much damage on a successful one. If the poison damage reduces the target to zero hit points, the target is stable but poisoned for 1 hour, even after regaining hit points, and is paralyzed while poisoned in this way.

Leg. Melee Weapon Attack: +7 to hit, reach 10 ft, one target. Hit: 11 (2d6+4) piercing damage, and the target must make a DC 16 Strength saving throw or be knocked back 15 feet and fall prone. If the target hits a wall, they take 3 (1d6) bludgeoning damage. Large or larger creatures automatically succeed this saving throw.

Web (Recharges 5-6). Ranged Weapon Attack: +7 to hit, range 40/80 ft., one creature. Hit: The target is restrained by webbing. As an action, the restrained target can make a DC 13 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).