Crystal Spider

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.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 7 (3d8 + 5) piercing damage, and the target must make a DC 16 Constitution saving throw, taking 9 (2d8) poison damage on a failed save, or half as much damage on a successful one. If the target fails the save, they become petrified and can only be freed by a greater restoration or spell of a higher level.

Crystalin Web. Ranged Weapon Attack: +5 to hit, range 30/60 ft., one creature. Hit: The target is restrained by webbing that hardens upon contact with the target. As an action, the restrained target can make a DC 15 Strength check, bursting the webbing on a success. The webbing can also be attacked and destroyed (AC 20; hp 5; immunity to bludgeoning, poison, and psychic damage). The spider may also choose to not sever the webbing and use an action to pull the target 30 ft closer given it wins a strength contest.