From Pathfinder Kingmaker, which isn't enabled.

Trapdoor Ogre Spider

CREATURE 5

Variant Ogre spider

These terrifying creatures grow as large as elephants. The placement of their eyes above their wide mandibles evokes the grimacing visage of an ogre's leer. Ogres themselves find the appearance of ogre spider faces simultaneously amusing and adorable, but in most cases, ogres' attempts to keep these spiders as pets result in dead ogres and well-fed spiders.

Perception +13; darkvision

Skills Acrobatics +13, Athletics +13, Stealth +13

Str +6, Dex +4, Con +4, Int -5, Wis +2, Cha -4

AC 23; Fort +15, Ref +13, Will +9

HP 70

Trapdoor Lunge

Trigger A creature comes within 25 feet of the spider's lair while the spider is positioned just under the ajar trapdoor and the spider notices the creature

Requirements Initiative has not yet been rolled

Effect The spider Strides or Climbs before it rolls initiative.

Speed 30 feet, climb 30 feet

Melee Fangs +15 (reach 10), Damage 2d8+8 piercing plus Ogre Spider Venom

Eerie Flexibility

A trapdoor ogre spider can fit through tight spaces as if it were a Large creature. While Squeezing, it can move at its full speed.

Ogre Spider Venom (poison)

Saving Throw DC 22 Fortitude

Maximum Duration 6 rounds

Stage 1 1d6 poison damage (1 round)

Stage 2 1d6 poison damage, Clumsy 1, and Off-Guard (1 round)

Stage 3 2d6 poison damage, clumsy 1, and off-guard (1 round)

Stage 4 2d6 poison and Paralyzed (1 round).

Pathfinder KingmakerOGL