Cave 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.

The Cave spider makes 3 attacks one bite and two stabs.

Bite. Melee Weapon Attack: +11 to hit, reach 5 ft., one creature. Hit: 33 (7d8+5) piercing damage, and the target must make a DC 16 Constitution saving throw, taking 22 (4d10) 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.

Leg stab. Melee Weapon Attack: +8 to hit, reach 5 ft., one creature. Hit: 27 (4d8+5) piercing damage, and the target must make a DC 12 Constitution saving throw, taking 5 (1d10) poison damage on a failed save, or half as much damage on a successful one.