Giant Spider

To snare its prey, a giant spider spins elaborate webs or shoots sticky strands of webbing from its abdomen. Giant spiders are most commonly found underground, making their lairs on ceilings or in dark, web-filled crevices. Such lairs are often festooned with web cocoons holding past victims.

Traits
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.

Actions
Bite : Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 7 (1d8 + 3) 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.

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 12 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)