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

Aberrant Ground. The ground in a 10-foot radius around the spider is a sticky web of difficult terrain. Each creature that starts its turn in that area must succeed on a DC 10 Strength saving throw or have its speed reduced to 0 until the start of its next turn.

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 5 (1d6+2) piercing damage, and the target must succeed on a DC 13 Constitution saving throw or take 2 (1d4) necrotic damage.