Cragadair Deigh (Ice Demon 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.

Broodmother.  Cragadair Deigh will almost always have hungry young to feed, and will spawn 1d10+5 ice spider at the beginning of combat.

Arctic Ambush.  Cragadair Deigh is able to lie hidden beneath the snow, well enough that victims have walked within inches of her without knowing she is there.  She will get a surprise attack, which almost always will be a web attack in an attempt to subdue multiple targets.  Once she has a victim in her webs, she will bite them and inject her poisons into them until they are paralyzed.  She will either feed upon them, or she will lay her eggs within their living body.

Egg Lay.  Should the queen attack a victim while they are restrained in webbing, she will attempt to sting them.  If the sting attack  is successful, the target must make a DC 18 Constitution saving throw.  On a failure, the target has had an egg implanted within them.  Only a greater restoration spell will cure them of this condition.  Over the next 1d10+4 days, the victim will have an ice spider growing within them.  The spider will begin to eat its way out of the victim when its birthing time arrives, doing 4d10 damage.  Even if the spider is killed, the victim will forever be vulnerable to cold damage.

Bite. Melee Weapon Attack: +9 to hit, reach 5 ft., one creature. Hit: 9 (1d12 + 3) piercing damage, and the target must make a DC 14 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 paralyzed while poisoned in this way.  Consecutive hits raise the DC by 1 each time.   If she bites someone restrained by her webbing, they lose all Dexterity bonuses to their armor class.

Web (Recharge 5–6). Ranged Area of Effect Attack:  Cragadair Deigh can shoot out webbing in a 30' cone originating from herself.   Any creature, except for her brood spiders, must make a Dexterity Saving throw (DC 16).  Failing, the targets are restrained by webbing. While restrained in an ice spider’s web, a creature takes 6 cold damage at the start of each of its turns. As an action, the restrained target can make a DC 16 Strength check, breaking free of the webbing on a success. The webbing can also be attacked and destroyed (AC 15; hp 25; vulnerability to fire damage; immunity to poison, and psychic damage)   Fire will cause anyone restrained the same amount of damage as the webbing.

Sting.  Should the Queen attack someone who is trapped in her webbing, she will use her stinger, attacking at advantage because of the restrained condition of her target.  Melee Weapon Attack: +13 to hit, reach 5 ft., one creature. Hit: 5 (1d6 + 3) piercing damage, and the target must make a DC 18 Constitution saving throw.  On a failure, the target has had an egg implanted within them.  

Leg Attack.  Upon receiving damage from an attack from behind, she can use her reaction to make an attack roll upon the person attacking her.  Melee Weapon Attack: +8 to hit, reach 5 ft., one creature. Hit: 9 (1d8 + 3) piercing damage