Hellfire Magic

You learned the secrets of hellfire magic, allowing you to call on hellfire's white glowing flames to serve your commands and burn your foes like nothing else. You gain the following benefits:

• Whenever you cast a spell that deals fire damage, you can spend one Hit Die to infuse it with hellfire, Roll the die, add that damage to the fire damage you would deal, when you do this the spell you cast ignores resistance and immunity to fire damage.
• When you roll fire damage for a spell you cast, you can reroll any roll of 1 on the fire damage dice, but you must use the new roll, even if it is another 1.
• As a bonus action you can spend one Hit Die, to cause flames to wreathe you until the end of your next turn. The flames don’t harm you or your possessions, and they shed bright light out to 30 feet and dim light for an additional 30 feet. While the flames are present, any creature within 5 feet of you that hits you with a melee attack takes 1d4 fire damage, this ignores resistance and immunity to fire damage.