Constricting Vines

A shambling mound's vines coil around any creature it hits with a slam attack. The shambling mound attempts a grapple maneuver check against its target, and on a successful check its vines deal 2d6+5 damage and the foe is grappled. Grappled characters cannot move, and take a -2 penalty on all attack rolls and a -4 penalty to Dexterity. Grappled characters attempt to escape every round by making a successful combat maneuver, Strength, Athletics, or Mobility check. The DC of this check is the shambling mound's CMD. Each round, creatures grappled by a shambling mound suffer 4d6+10 damage. A shambling mound receives a +4 bonus on grapple maneuver checks.