Two-Weapon Mastery

You have become so practiced in the art of dual-wielding that you now string your off-hand attack flawlessly into a terrifying onslaught of blows. You gain the following benefit:

Blade Storm. You may now make a Two-Weapon Fighting attack as part of your attack action, rather than as a bonus action. This attack takes place after you have resolved all normal attacks from taking the attack action. All normal effects of a Two-Weapon Fighting attack still apply, except for using a bonus action. If you do so, you may not make an additional Two-Weapon Fighting attack using your bonus action this turn.