Monstrous Spider (Small)
(Small vermin, unaligned)
AC: 14 (natural armor)
Hit Points: 4 (1d8)
Speed: 30 ft.
STR: 7 (-4) DEX: 17 (3) CON: 10 (0) CHA: 2 (-4)
Skills Acrobatics +11, Stealth +11, Passive Perception 10
Senses darkvision 60 ft., tremorsense 60 ft
Challenge 1/4 (50 XP)
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 the web, the spider knows the exact location of any other creature in contact with the same web.
Web walker. The spider ignores moving restrictions caused by webbing of any sort.
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 on a successful one. If the poison reduces the target to 0 hit points, that target is stable but poisoned for 1 hour, and paralyzed while poisoned in this way.
Web (recharge 5-6). Ranged Weapon Attack: +5 to hit, range 30 ft./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 weapon on a success. The webbing can also be attacked and destroyed (AC 10; hp 5; vulnerable to fire damage; immune to bludgeoning, poison, and psychic damage).
Usually found underground, the lair of a spider is often festooned with webs holding helpless victims.