Dual Weapon Master

When two-weapon fighting, or wielding a Double-bladed Scimitar, you get the following benefits. 

• Increase your Strength or Dexterity score by 1, to a maximum of 20.
• You make attacks with your off-hand weapon as an additional attack instead of using your bonus action.
• You make attacks with your Double-bladed Scimitar's special ability as an additional attack instead of using your bonus action. 
• When making an opportunity attack, you can make an additional attack with your off-hand weapon, or with the Double-bladed Scimitar's special ability.