Venomous Giant Spider

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Large Beast, Neutral

Armor Class 14 (natural armor)

Hit Points 66 (11d10+11)

Speed 30 ft. climb 30 ft.

STR 16 (+3)

DEX 16 (+3)

CON 12 (+1)

INT 1 (-5)

WIS 12 (+1)

CHA 1 (-5)

Saving Throws Dex +5

Skills Stealth +7

Damage Resistances bludgeoning, piercing, and slashing from nonmagical attacks

Senses darkvision 60 ft., passive Perception 12

Languages —

Challenge 4 (1,100 XP) Proficiency Bonus +2

Web Walker. The spider can move up, down, and across vertical surfaces and upside down on ceilings without needing to make an ability check.

Poisoned Fangs. The spider's bite is laced with a potent poison. A creature hit by its bite must make a DC 14 Constitution saving throw, taking 22 (4d10) poison damage on a failed save, or half as much damage on a successful one.

Actions

Multiattack. The spider makes two attacks: one with its bite and one with its web.

Bite. Melee weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 15 (2d10+4) piercing damage. If the target is a creature, it must make a DC 14 Constitution saving throw, taking additional poison damage.

Web. Ranged weapon Attack: +6 to hit, range 30/60 ft., one target. The spider shoots a web at a creature it can see within range. The target must succeed on a DC 14 Dexterity saving throw or be restrained. A creature restrained by the web can use its action to make a Strength check against the DC to free itself.

Environment Forest, Mountain

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Lore & Description

Appearance

The Venomous Giant Spider is a formidable predator, its body a glossy black adorned with intricate patterns of dark green and yellow. Its eight limbs are long and powerful, each ending in sharp, chitinous claws. The abdomen features pulsating spots of orange that hint at the deadly venom coursing through its fangs. This monstrous arachnid moves with unnatural silence, making it a master ambusher.

Behavior & Origins

Found in dense forests or steep mountain slopes, these spiders are solitary hunters, spinning massive webs to ensnare prey. They prefer to strike from above, dropping onto unsuspecting victims. They are known to stalk their targets for days, perfecting the art of the ambush. Many tales tell of adventurers who have gone missing in their webs, never to return. Despite their fearsome reputation, young spiders can sometimes be found in small groups, learning to hunt and weave.

Monster Image

Generation Info

Original prompt:
"A venomous giant spider"

Created: Jan 28, 2026
Modified: May 31, 2026