Arachne

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.

Hidden abillity: The spider takes the abillity to hide like a gloom staker in dim and darkness

Profiencies: Arachne has proficiences in dex. con. and str. abillitys( plus seven) 

Arachne has two level 5th level spells, one level 6th spell , and one level 7th spell.

Bite. Melee Weapon Attack: +12 to hit, reach 5 ft., one creature. Hit: 7 (4d8 + 3) piercing damage, and the target must make a DC 11 Constitution saving throw, taking 9 (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.

Web (Recharge 5–6). Ranged Weapon Attack: +12 to hit, range 30/60 ft., one creature. Hit: The target is restrained by webbing. 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 17; hp 23; vulnerability to fire damage; immunity to bludgeoning, poison, and psychic damage).

(1 per day) Wall of Spider Web, It's ON FIRE. 

A blast of web comes forth from your hand and tries to restrain each creature in a 35ft by 35ft square. Each character must succeed a dc 13 arcrobatics or athletics. if the character fails they are considered restrained. After a round the web self lights itself on fire, each character on or restrainded by the webs takes 8d8 fire damage.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 3d8 for each slot level above 5th.

If Arachne is succumbed below half HP she releases a poisonous breath dealing 16d8 poision damage. any character who succeed a DC 14 con. save takes half damage.