By mastering one of the other combat styles, you have gained the ability to master Two Handed Fighting in a special capacity.
While Two-Handed Fighting: +120% Strikethrough Chance. You also gain a +6 Combat Style bonus to Melee Power while Two-Handed Fighting.
For the purpose of this feat, you are considered to be Two-Handed Fighting while using a Two-Handed Melee Weapon (not including Handwraps). You are also considered to be Two-Handed Fighting while wielding a Bastard Sword or Dwarven Waraxe in your main hand and a Shield, Orb, Rune Arm, or Nothing in your off-hand. You are not considered to be Two-Handed Fighting while in Druid Animal Forms.
In addition, While using a Two Handed Weapon, you now apply 75% more of your appropriate ability score modifier to damage (This adds to their existing 50% base bonus). When using a Bastard Sword or Dwarven Waraxe in your main hand and a Shield, Orb, Rune Arm, or Nothing in your off-handyou now apply +50% more of your appropriate ability score to your damage. (This adds to the existing 10% bonus for wielding a Hand-and-a-Half weapon. If you have bonuses to ability score modifier to damage from both Single Weapon Fighting and Two Handed Fighting feats (including this one), and are in a situation where both would apply, only the highest of the two applies).
This does not work in Animal Form. This does not count as a Combat Fighting Style feat. You may not take this feat if you've taken the Two Handed Fighting feat.