You have the strength and skill to use great weapons in battle in a way that only few warriors reached. You gain the following benefits:

• Your Strength score increases by 1, to a maximum of 20.
• You have gained the ability to wield a two-handed weapon in one hand while in combat. While doing so you may wield an item in your other hand that has the light or finesse property. 
• You can use weapons with the two-handed property in only one hand, doing so reduce the  damage dice of the weapon in one category. If the weapon deals 2d6 or 1d12, the new dice will be 1d10, if the dice already is a d10, becomes a d8.