n large mindless plant 

Perception +10; low-light vision, tremorsense 30 feet

Skills Athletics +9, Stealth +9

Str +4 Dex +0 Con +3 Int -5 Wis +3 Cha +0

Camouflage The assassin vine can Hide in natural environments even if it doesn't have cover.

AC  18; Fort +10, Ref +7, Will +8

HP 68; Weaknesses fire 5, slashing 5

Grasping Foliage [R] (primal, transmutation) Trigger The assassin vine detects a creature within 20 feet via tremorsense; Effect The assassin vine causes vegetation within a 20-foot emanation to writhe for 1 round, turning this area into difficult terrain. When a creature starts its turn in this area, it must attempt a DC 20 Reflex save. On a failure, it takes a –10-foot circumstance penalty to its Speeds until it leaves the area, and on a critical failure it is also immobilized for 1 round. A creature can attempt to Escape to remove these effects. Assassin vines are immune to Grasping Foliage.

Speed 5 feet

Melee [>] vine +12 (reach 10 feet), Damage 1d8+6 bludgeoning plus Grab

Constrict [>] 1d8+4 bludgeoning, DC 20

Bestiary 2, page 26.