Fire Fist

You are able to channel your inner passion into your attacks.  Once per turn, you may use the Attack action to make a special Fire Fist attack.  If you are able to make multiple attacks with the Attack action, this replaces one of them.  The Fire Fist attack is an unarmed strike and has a reach of 10 feet.  The attack deals fire damage, rather than bludgeoning, and if you hit, you roll an additional martial art dice.  You may also make an opportunity attack using your Fire Fist attack as a reaction to a creature leaving 5 or 10 foot range.