Feat: Ambush Bladderwort
You plant the seed of a giant bladderwort in an unoccupied square of ground or water within 30 feet. It lasts for 10 minutes. Using this impulse again ends any previous one. If a creature enters its square, the seed erupts into a voluminous, translucent plant that seals tight around the triggering creature and fills with water. Unless the creature succeeds at a Reflex save against your class DC, it's Immobilized within the bladderwort and must hold its breath or begin drowning. The Escape DC is also your class DC. The plant has AC 10 and 50 Hit Points.
If a creature dies inside it, the plant shrinks down, converting itself and the remains into a watery fruit. A creature can eat this consumable to regain (floor((max(4,@actor.level)-4)/4)+1)d8+(floor((max(4,@actor.level)-4)/4)*4+4) healing HP, after which that creature is temporarily immune for 10 minutes. This fruit rots after 1 hour.
Level (+4) The bladderwort's HP increase by 25 and the fruit's healing increases by 1d8+4.