Titanic Grip

You have trained extensively with massive weapons, allowing you to wield them with unparalleled skill and finesse.

• You can use a great weapon in one hand, treating it as a versatile weapon. When you do so, you don't suffer disadvantage on attack rolls with it due to not wielding it with two hands.
• When you take the Attack action and attack with a great weapon that you're wielding in one hand, you can use a bonus action to make a melee attack with a different great weapon that you're wielding in your other hand.
• Before you make a melee attack with a great weapon that you're wielding in one hand, you can choose to take a -5 penalty to the attack roll. If the attack hits, you add +10 to the attack's damage.