Monster Manual
Stealth 1d20+7
Blindsight 10ft, Darkvision 60ft, Perception 10
Bite. Melee Weapon Attack: 1d20+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: 1d20+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).
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.