Rock Camouflage. As a bonus action, the spider can magically shift its appearance to resemble that of a statue form of itself or blend into a rocky terrain.

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

Pack Tactics:  Gains advantage on attack rolls as long as any ally is within 5ft., of a target.

Bite. Melee Weapon Attack: +12 to hit, reach 5 ft., one creature. Hit: 17 (1d10 + 21) piercing damage, and the target must make a DC 18 Constitution saving throw, taking 48 (8d8) 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.