Antharachnid

Hexad Arm Structure. The Antharachnid is able to move and climb normally whilst prone, and can right themselves for only 5 feet of movement.
Additionally, it has six hands instead of two, which can be used to grab extra objects, weapons, or people (grappling uses two hands instead of one).

Web Adept. The Antharachnid does not suffer movement penalties from walking on webs; it instead moves twice as fast.

Web Sense. Creatures that touch a web that the Antharachnid is also touching are made known to it, and loses any sight-based advantages (such as being Invisible or in Dim Light) until it steps off.

Multiattack. The Antharachnid makes a Restraining Grapple attempt or a Venomous Bite attack, then makes two Claw attacks.
If the Antharachnid does not have any hands free, it makes three Venomous Bite attacks instead.

Claw. Melee Natural Weapon Attack. +6 to hit, range 5 ft., one target. Hit: 13 (3d6+3) Slashing damage.

Restraining Grapple. The Antharachnid grapples one target of size Medium or smaller that it can touch. Creatures grappled this way instead receive the restrained condition until they escape or are let go.

Venomous Bite. Melee Natural Weapon Attack. +6 to hit, range 5 ft., one target. Hit: 10 (2d6+3) Piercing damage and 13 (3d6+3) Poison damage.
If this attack is used against a restrained creature, it deals an additional 10 (3d6) Poison damage.

Lay Webbing (Recharge 5-6). The Antharachnid places webbing on the tile it is standing on and on the tile behind it. This webbing is considered Difficult Terrain that activates the Web Adept and Web Sense traits.