The magical energy that surges through your body is more powerful than you could ever know. With enough time and power, the energy of your magic can even bind together with your soul and protect your body like an aura. As long as you have a number of spell slots whose level equals 4 or more in any combination, you will have a magical barrier which gives you an AC of 12 + your Dexterity modifier + your Intelligence modifier. You must not be wearing armor in order to use this feature. This barrier is visible during combat and sheds dim light in a 5 foot area, you may choose the appearance of this aura. If your combined spell slots fall below 4 or if you fall unconscious, this barrier dissipates. You may reactivate this barrier by using an action.