Deadly Finish (Combat)Modifier
Your attacks don't just fell your opponents—they kill them outright.
Prerequisite: Base attack bonus +11, Cleave
Benefit: When you hit with a melee attack and reduce your opponent to –1 or fewer hit points, you can force that opponent to succeed at a Fortitude save (DC 15 + the damage your attack dealt) or die.
Essentia: Increase the DC by +1 & work on the target if she have less than 10% / Essentia of is Max Hit Points