Arch Taratect V2

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 two bite attacks and one Slam attack.

Slam. Each creature within 5 feet of the spider must succeed on a DC 17 strength or dexterity saving throw or take 4d6 bludgeoning damage, or half as much on a successful one. If the spider falls as a part of this action, this attack deals additional damage equal to 1d4 times the number of squares fallen.

Draining Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one creature. Hit: 14 (2d8 + 5) piercing damage and the Taratect regains hit points equal to the damage dealt. The target must succeed on a DC 17 Constitution saving throw or its hit point maximum is reduced by an amount equal to the damage taken. This reduction lasts for one hour. 

Domination Aura. Each creature which starts its turn within 5 feet of the spider takes 2d4 poison damage.

Web Column (Recharge 5–6). The Arch Taratect shoots a 90-­foot line of webs that is 5 feet wide. Each creature in that line must make a DC 17 Dexterity saving throw, taking 2d4 bludgeoning damage on a failed save, or half as much damage on a successful one. 
The webs are difficult terrain and lightly obscure their area. Each creature that starts its turn in the webs or that enters them during its turn must make a Dexterity saving throw. On a failed save, the creature is restrained as long as it remains in the webs or until it breaks free. A creature restrained by the webs can use its action to make a Strength check against your spell save DC. If it succeeds, it is no longer restrained. The webs are flammable. Any 5-foot cube of webs exposed to fire burns away in 1 round, dealing 2d4 fire damage to any creature that starts its turn in the fire.