Werespider (5e Creature)
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Medium humanoid (human, shapechanger), neutral evil
Skills Perception +2, Stealth +7
Shapechanger. The werespider can use its action to polymorph into a spider-humanoid hybrid or into a Large spider, or back into its true form, which is humanoid. Its statistics, other than its size and AC, are the same in each form. Any equipment it is wearing or carrying isn't transformed. It reverts to its true form if it dies.
Spider Climb. The werespider can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.
Web Sense (Spider or Hybrid Form Only). While in contact with a web, the werespider knows the exact location of any other creature in contact with the same web.
Web Walker (Spider or Hybrid Form Only). The werespider ignores movement restrictions caused by webbing.
Multiattack (Humanoid or Hybrid Form Only). The werespider makes three attacks, only one of which can be a bite.
Bite (Spider or Hybrid Form Only). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 3) piercing damage, and the target must make a DC 12 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 paralysed while poisoned in this way. If the target is a humanoid and fails its Constitution saving throw, it is cursed with werespider lycanthropy.
Claws (Hybrid Form Only). Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 8 (2d4 + 3) slashing damage.
Dagger (Humanoid or Hybrid Form Only). Melee or Ranged Weapon Attack: +5 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 5 (1d4 + 3) piercing damage.
Web (Spider Form Only; 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).
Werespiders are aggressive lycanthropes that like ambushing and poisoning victims, striking with daggers or their own razor-sharp claws. In humanoid form, a werespider is very hairy and has unusually long legs. In battle, a werespider prefers to enter spider form to fling webs at troublesome prey or prey attempting to escape, but it typically fights in hybrid form. Though a werespider gains four additional limbs when it enters its hybrid form, it can only use these limbs to simply manipulate its environment and climb, and cannot use them for fine manipulation or to carry weapons. Werespiders can commonly be found in large groups underground or in other dark places, as they dislike sunlight.
Characters as Werespiders
The character gains a Dexterity of 16 if his or her score isn't already higher, and a +1 bonus to AC while in spider or hybrid form (from natural armour). Attack and damage rolls for the natural weapons are based on whichever is higher of the character's Strength or Dexterity.