uncommon ce large undead 

Variant driders (Bestiary 159)

Perception +24; darkvision

Languages Elven, Necril, Undercommon

Skills Acrobatics +30, Athletics +28, Intimidation +24, Stealth +30

Str +6 Dex +8 Con +4 Int -1 Wis +5 Cha +4

AC  34; Fort +24, Ref +26, Will +23

HP 235, negative healing; Immunities death effects, disease, paralyze, poison, unconscious

Sack of Spiders [R] Trigger The death drider is reduced to 0 Hit Points; Effect The death drider explodes in a shower of spiders. Each adjacent creature must succeed at a DC 31 Reflex save or take 3d6 piercing damage and be exposed to death drider venom.

Speed 30 feet, climb 30 feet

Melee [>] fangs +27, Damage 4d6+13 piercing plus death drider venom

Ranged [>] web +27 (range increment 30 feet), Effect hungering web

Death Drider Venom (poison) The drained condition persists after the poison's duration ends Saving Throw DC 32 Fortitude; Maximum Duration 6 rounds; Stage 1 2d8 poison damage and drained 1 (1 round); Stage 2 3d8 poison damage and drained 2 (1 round); Stage 3 4d8 poison damage and drained 2 (1 round)

Hungering Web A creature hit by a death drider's web attack is immobilized and stuck to the nearest surface (Escape DC 31). Each round thereafter until it breaks free, the creature takes 3d6 piercing damage (DC 31 basic Reflex save) and, on a failed save, is exposed to death drider venom.

Extinction Curse #5: Lord of the Black Sands, page 35.