Ignis Pallium

The hellish flames that represent your sins have grown accustomed to this new body and now try to protect it. Once per long rest, you may use a bonus action to wreath your body in robes or armor made of hellish purple flames for 1 minute. For the duration, you are immune to nonmagical fire damage and whenever you are hit by a melee attack, the attacker takes 1d10 fire damage. You can choose to end this effect early with a bonus action, adding 1d4 x the number of remaining turns to the next damage roll you make but in return you take half of the damage.