Chromatic Spider (Fire, Ice, Acid, Poison, Lightning)

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.

Chromatic Essence. Chromatic spiders have been mutated by the Evoker's Stone. As such they retain the essence of their chromatic connection. They gain resistance to the type of damage connected to their essence, as does their webbing. Additional damage of the type connected to their chromatic essence is dealt to the target on a successful hit. Also any creature restrained by the spiders' webs takes 1d6 damage of the same type as their essence at the start of any turn in which the creature is restrained by the webbing. In order to determine which chromatic essence a spider connects to roll 1d6. 1=Fire, 2=Ice, 3=Acid, 4=Poison, 5=Lightning. on a roll of a 6, the creature dies instantly due to the chromatic effect attacking the host itself. 

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 7 (1d8 + 3) piercing damage, and the target must make a DC 11 Constitution saving throw, taking 9 (2d8) chromatic essence 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 30/60 ft., one creature. Hit: The target is restrained by webbing. While restrained in an ice spider’s web, a creature takes 1d6 chromatic essence damage at the start of each of its turns. As an action, the restrained target can make a DC 15 Strength check, bursting the webbing on a success. The webbing can also be attacked and destroyed (AC 10; hp 5; immunity to poison, and psychic damage).

Rear back. As a reaction a chromatic spider can attempt to move out of the way of an oncoming melee attack. It must succeed on a DC14 Dexterity Saving throw. If it succeeds, it takes half damage from the melee attack. If it fails it takes full damage.