Devil Style - Elemental Fury

Studying demonic power you gain the elemental fury style. Giving you the following benefits. 

Hit-Points Increase - You gain hit-points equal to your character level. And an additional hit-point for every level up after. 

Extra Attack - You can attack an additional time when you take the attack action. 

Elemental Fury - Choose 1 of the 4 elements to gain proficiency in using: Air, Fire, Water, or Earth

- Transformation - As a bonus action you can transform giving you futher benefits for 1 minute. You can do this twice per long rest.