Two Weapon Mastery

You master fighting with two weapons, gaining the following benefits:

• Increase your Strength or Dexterity by 1, to a maximum of 20.
• You gain a +1 bonus to AC while you are wielding a separate melee weapon in each hand.
• When you take the attack action on your turn with a light weapon you are wielding in one hand, you may make one additional attack with a light weapon you are wielding in your other hand, as part of the same action.