Cryofang

Ice Walk. The dragon can move across and climb icy surfaces without needing to make an ability check. Additionally, difficult terrain composed of ice or snow doesn't cost it extra movement.

Spider Climb. Cryofang 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. Cryofang ignores movement restrictions caused by webbing.

Multiattack. The dragon makes three attacks: one with its bite or web and two with its claws.

Bite.  Melee Weapon Attack:_ +6 to hit, reach 10 ft., one target. _Hit:_ 15 (2d10 + 4) piercing damage, plus 4 (1d6) cold damage, and the target must make a DC11 Constitution saving throw, taking 7 (2d6) poison damage on a failed save, or half as much on a successful one. If poison damage reduces the target to 0 hit points, the target is table but poisoned for 1 hour, even after regaining hit points, and is paralyzed while poisoned in this way.

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage.

Cold Breath (Recharge 5–6). The dragon exhales an icy blast in a 30-foot cone. Each creature in that area must make a DC 15 Constitution saving throw, taking 45 (10d8) cold damage on a failed save, or half as much damage on a successful one.

Web (Recharge 5-6). Ranged Weapon Attack: +6 to hit, range 45/90 ft., one creature. Hit: The target is restrained by webbing. As an action, the restrained target can make a DC12 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)