Aranea

Medium Monstrosity, Neutral

AC: 14

Initiative: +3 (13)

HP: 66 (12d8 + 12)

Speed: 30 ft., climb 30 ft. (spider or hybrid form only)

STR: 10 (+0)
DEX: 17 (+3)
CON: 12 (+1)
INT: 12 (+1)
WIS: 10 (+0)
CHA: 15 (+2)

Skills: Perception +2, Stealth +5

Senses: Darkvision 60 ft., Passive Perception 12

Languages: Common

CR: 2 (XP 450; PB +2)

Habitat: Forest, Swamp

Treasure: Individual

Spider Climb (Hybrid or Spider Form Only).

The aranea can climb difficult surfaces, including along ceilings, without needing to make an ability check.

Web Walker.

The aranea ignores movement restrictions caused by webs, and it knows the location of any other creature in contact with the same web.

Spellcasting.

The aranea casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 12):

At will: Friends, Silent Image

1/day: Hold Person

Actions

Multiattack.

The aranea makes two attacks, using Bite, Slam, or Sling in any combination.

Bite (Hybrid or Spider Form Only).

Melee Attack Roll: +5, reach 5 ft. Hit: 6 (1d6 + 3) Piercing damage plus 2 (1d4) Poison damage.

Slam.

Melee Attack Roll: +5, reach 5 ft. Hit: 7 (1d8 + 3) Bludgeoning damage.

Sling (Humanoid or Hybrid Form Only).

Ranged Attack Roll: +5, range 30/120 ft. Hit: 8 (2d4 + 3) Bludgeoning damage.

Bonus Actions

Shape-Shift.

The aranea shape-shifts into a humanoid form, into a humanoid-spider hybrid form, or back into its true spider form. Its game statistics are the same in each form, except where noted. Any equipment it is wearing or carrying isn't transformed.

Find this creature in the encounter builder

Source: The Lost Library of Lethchauntos, p. 250 - Licenses and attribution