Alchemist Spider

Web Walker. The spider ignores movement restrictions caused by webbing.

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.

Weave. +3 to hit, reach 5 ft., 1 restrained target. The target must make a DC 12 Strenght check or become enveloped in thick layer of webbing, considering it is already restrained by one. The target is considered partly mute, deafened, and blind until it is freed. The DC for escaping the web is 15 plus 1 for every turn spent weaving. 

Fang bite. Melee Weapon Attack: +3 to hit, reach 5 ft., 1 target. Hit: 3 (1d4 + 1) Piercing damage, and the target must make a DC 10 Constitution check or become poisoned for 1 hour. Every 1d20 minutes while the target is poisoned, it must make the same check or take 1d4 poison damage. On successful save, the effect ends.

Web spit. Ranged Weapon Attack: +3 to hit, range 30/60 ft., 1 target. Hit: The target must make a DC 11 Dexterity check or become connected to the spider with a string. The Spider can use its reaction to pull the target 5 ft. closer, as explained in dragging reaction. The target must make a DC 13 Strength check when going 60 feet away from spider. On a successful save, the web breaks. On failed save, the target is dragged 5 feet towards the spider. 

Stealth. The Alchemist's Spider rolls a stealth check.

Drag. The target must make a DC 12 Strength check or be pulled 5 feet towards the spider, with additional 5 feet for every other string on the same target. The limb the string is on is unusable, cannot move or attack. The string can be attacked (AC 10, 5hp, vulnerability to fire, immunity to bludgeoning, physic, necrotic, or poison damage)