EnLarge Form

due to your Giant ancestry you have the ability to supernaturally grow yourself and your weapon.
As a Bonus Action, you change your Size to Large, provided you’re in a big enough space.
While this weapon is enlarged, your attacks with them deal 1d4 extra damage. 
This transformation lasts for at least 10 minutes or until you end it as a Bonus Action.
During that duration, you have Advantage on Strength Checks, and your Speed increases by 10 feet.
Once you use this trait, you can’t use it again until you finish a Long Rest.

The longer the Character attempts to maintain the form the more likely they are to gain levels of exhaustion.