Improved Impaling Critical (Combat, Critical)Modifier
When you impale a target, you hinder its movement and can cause severe bleeding.
Benefit: While you are using Impaling Critical to impale an opponent, and you are still holding onto that weapon, that opponent must succeed at a grapple combat maneuver check against you to pull your weapon out. If you have let go of your weapon, the impaled opponent must spend a standard action to remove the weapon. Until the opponent pulls the weapon out, his speed in all modes is halved and his maneuverability, if any, is reduced by one step. When the weapon comes out, instead of dealing the damage normal for Impaling Critical, you can deal bleed damage equal to your weapon's damage dice result once per round at the start of that opponent's turn.
Essentia: The Grapple check DC to removed the weapon is increase by +1 / Essentia and the target Bleed for 2 Damage / Essentia each round the weapon is inside and not hold by you