You wake up in the body of a devil, a powerful being of infernal energy. While your true form is inscrutable to being of lesser power, you instead appear as a humanoid with colored skin and bat wings. Your exact appearance is malleable to a degree. All devils are timeless, you do not age.
As an infernal being, you have natural proficiency with any infernal or spiritual magic or powers as well as a significantly greater well of power to draw from. In addition to this, you have 150 years of experience to distribute between any of your powers that increase in strength with skill. Due to their nature, your powers are more effective against angels.
When assuming a physical form, you are able to contest an adult dragon for strength and toughness in a much smaller package.