Dual Mastery

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

• You gain a +1 bonus to AC while you are wielding a separate melee weapon in each hand.
• You gain the Two-Weapon Fighting fighting style if you don't already have a fighting style.
• When you use your bonus action to make your off-hand attack, you may take a -5 penalty to the attack roll to attack simultaneously with both weapons you are holding. If the attack hits, calculate damage as if you hit with both your main hand weapon and your off-hand weapon, but only add your ability modifier once.