Chasmback Weaver

Spider Climb. The Chasmback Weaver can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

Toxic Webbing. As a lair-bound arachnid, the Chasmback Weaver can expel webs coated in sticky venom, forcing creatures restrained by its webbing to make a DC 18 Constitution saving throw at the start of their turn or take 18 (4d8) poison damage. The webbing itself can be attacked (AC 14, HP 20), and it is vulnerable to fire.

Aquatic Ambush. While underwater, the Chasmback Weaver is effectively invisible when hiding in murky or swampy waters. It can strike from ambush, using both Stealth and its venomous strikes to cripple prey before they realize what is attacking them.

Venomous Fangs. The Chasmback Weaver’s bite exposes a creature to deadly venom. On a hit, the target must make a DC 18 Constitution saving throw, taking 22 (5d8) poison damage on a failed save, or half as much on a successful one. If a target fails the saving throw by 5 or more, they are also paralyzed for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the paralysis early on a success.

Amphibious. The Chasmback Weaver can breathe both air and water.

Multiattack. The Chasmback Weavers makes three attacks: one with its Bite and two with its Claws.

Bite. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 21 (3d10 + 5) piercing damage plus 10 (3d6) poison damage. If the target is a creature, it must succeed on a DC 18 Constitution saving throw or become poisoned for 1 minute.

Claw. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 16 (2d10 + 5) slashing damage.

Web Spray (Recharge 5–6). The Chasmback Weaver projects a spray of webs in a 30-foot cone. Each creature in that area must make a DC 17 Dexterity saving throw. On a failed save, a creature is restrained by webs. As an action, the restrained creature can make a DC 16 Strength check, escaping from the webbing on a success. The webbing can also be attacked and destroyed (AC 14; hp 20; vulnerability to fire damage).

Death Roll. If the Chasmback Weaver successfully grapples a creature, it can use a bonus action to attempt a death roll. The target must make a DC 18 Strength saving throw or take 27 (4d12) bludgeoning damage and become prone.