Arctic Queen Spider

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 a web, the spider knows the exact location of any other creature in contact with the same web.

Web Walker. The spider ignores movement restrictions caused by webbing.

Multiattack. The spider makes three bite attacks, one of which can be replaced by a swallow attack.

Bite. Melee Weapon Attack: +9 to hit, reach 5 ft., one creature. Hit: 20 (3d10 + 5) piercing damage, and the target must make a DC 16 Constitution saving throw, taking 24 (6d8) 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.

Sting. Melee Weapon Attack: +9 to hit, reach 10 ft., one creature. Hit: 30 (6d10) piercing damage plus 30 (6d10) cold damage, and the target must succeed on a DC 16 Constitution saving throw, or become paralyzed for 1 minute. At the start of each of its turns, the target can make another Constitution saving throw, ending the effect on itself on a success.

Swallow. The spider makes one bite attack against a Large or smaller creature that is restrained by its web. If the attack hits, the target takes the bite’s damage, the target is swallowed, and the web is destroyed, ending the restrain condition. While swallowed, the creature is blinded and restrained, it has total cover against attacks and other effects outside the spider, and it takes 16 (4d8) acid damage plus 8 (2d8) cold damage at the start of each of the spider's turns.

If the spider takes 30 damage or more on a single turn from a creature inside it, the spider must succeed on a DC 22 Constitution saving throw at the end of that turn or regurgitate all swallowed creatures, which fall prone in a space within 10 feet of the spider. If the spider dies, a swallowed creature is no longer restrained by it and can escape from the corpse by using 30 feet of movement, exiting prone.

Web (Recharge 5–6). Ranged Weapon Attack: +9 to hit, range 45/90 ft., one creature. Hit: The target is restrained by webbing. As an action, the restrained target can make a DC 16 Strength check, bursting the webbing on a success. The webbing can also be attacked and destroyed (AC 13; hp 10; vulnerability to fire damage; immunity to bludgeoning, poison, and psychic damage).