Spider Climb. The spider climb difficult surfaces, including upside down on celings, without needing to make an ability check.
Web Sense. While in contract 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.
Flexable. Can fit anywhere its 1 inch wide fangs can.
Equipment
Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: (1d2) piercing damage, and the target must make a DC 11 Constitution saving throw, or get affected by the poison. On a failed save get paralysed and go into a dead looking state, on a successful one nothing happens. If the target is redused to 0 hit points, the target is gonna be in a coma for 1d4 days, even after regaining hit points, the target is paralyzed for 1d3 turns.