Hands of Arreat

You have learned how to manipulate large weapons to your advantage, and have learned how to effectively wield two gargantuan instruments of destruction simultaneously. When you take this feat, increase your Strength or Constitution score by 1 to a maximum of 20. 

Also, when you are holding a weapon with the two handed property in your off hand, you may attack as though you have the two weapon fighting perk, and you add your proficiency bonus and skill modifications to the second weapon as well.