Colossal Spider

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.

Multiattack the colossal spider makes 2 skewer attacks, or one bite attack.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 10(2d6 + 3) piercing damage, and the target must make a DC 11 Constitution saving throw, taking 7 (2d6) 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.

Skewer Melee Weapon Attack: +5 to hit, reach 10 ft., one creature. Hit: 10(1d12 + 3) piercing damage, and the target must succeed on a DC 14 STR save or be knocked prone and grappled (escape DC 13).