Giant Wolf Spider
Note: Real-world wolf spiders do not spin webs, and the MM 5e suggestion that they have web sense and are web walkers seems strange, and is not followed here.
The group of beasts in the forest is however somewhat unusual in another way, in that wolf spiders tend to be solitary, while these have banded together as a small group.
Str 12 (+1) Dex 16 (+3) Con 13 (+1) Int 3 (-4) Wis 12 (+1) Cha 4 (-3)
Perception+3 Stealth +7. Blindsight 10’. Passive perception 13.
Bite +4 to hit, reach 5’, 1D8+2 piercing damage. Target must make a con ST DC 11 or take 2D6 poison damage on a failed save.
See MM 5e for further descriptions.