Hell Spawn of Fire

For one minute per long rest, the tiefling can turn into a Hell Spawn. Channeling the bloodline of your hellish ancestors, you will take the form of a full fledged devil. The body will be enveloped in the element of your Ancestral Devil. You may describe how your devil looks as your body and equipment morph into this new body. Add Temporary hit points equal to 10 x Constitution bonus. Revert back to normal when the minute ends, you chose to end it, or if you become unconscious.

While you retain your number of attacks and stats per turn, you will gain the following abilities. For attacks, use the attack bonus for a nonmagical, proficient weapon.

Fire: Str or Dex +2 (Decide at transformation). Immunity to fire and fear. Speed is 50. Fly Speed of 50. Add proficiency bonus to intimidation, athletics, acrobatics, and religion checks.

-claw - 2d6 + STR or DEX slashing

-Bite - 1d6 + STR or DEX + 1d6 fire

-Blazing Hand - Reach of 15 feet - 2d8 fire damage.