Attors Rage

My blood boils at the sight of another dragonborn and my patron grants me unarmored AC and Str for 3 turns. I remove my armor and my scales are hardened with a dull purple glow around my entire body, my mind focuses on the enemies closest to me (if not the dragonborn) and the enemy dragonborn. i can no longer cast spells for the duration but instead take out either one 2 handed weapon or 1 2 handed weapon and become ready to attack and kill them.

1d6 for AC going to 2d6 later. 1d8 going to 2d8 later (str)

the duration will also increase at later levels. as well as the ability to either be snapped out of the rage, the ability to calm myself down and end the spell prematurely