Venos Arachna (5e Creature)
From D&D Wiki
Large monstrosity, unaligned
Spider Climb. The venos arachna 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 venos arachna knows the exact Location of any other creature in contact with the same web.
Web Walker. The venos arachna ignores movement restrictions caused by webbing.
Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 9 (1d10 + 4) piercing damage and the target must make a DC 13 Constitution saving throw, taking 18 (4d8) poison damage on a failed save, or half as much damage on a successful one. If it fails the saving throw by 5 or more, the target is also poisoned for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
Spit Venom (Recharge 5-6). The venos arachna spits venom in a 30-foot line that is 5 feet wide. Each creature in that line must make a DC 13 Constitution saving throw, taking 13 (3d6) poison damage on a failed save, or half as much damage on a successful one.
The venos arachna is a vile creature with the capabilities of a venomous snake combined with a giant spider. It is a chimerical being whose recipe is hidden among the pages of the Arachnomicron.