Voidcrawler

Spider Climb- The creature can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

Web Sense- While in contact with a web, this creature knows the exact location of any other creatures in contact with the same web.

Web Walker- This creature ignores movement restrictions caused by webbing

Void Attunement- 

• Darkvision 60 ft.
• Can sense living creatures within 30 ft.
• Advantage on stealth in shadows

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., 1 target. Hit:  (1d4) piercing damage plus (1d6) necrotic damage.

Web Throw. Ranged Weapon Attack: +4 to hit, range 10/20 ft., 1 target. Hit:  (1d6) bludgeoning damage. Rolls that land above 15 knock the target prone.

Pocket Void. Any creature who is willingly accepted into a voidcrawler's stomach make make a constitution save in order to safely travel within a tamed voidcrawler's body.

Opportunity Attack.