Some mobs (like dragons) have the ability to 'cast' firebreath. The mob has a chance of about 40% that he will roast you each attack round. You can save against the firebreath by saving-breath. If you are hit by firebreath you will suffer 1d5*lvl(mob) damage. If the firebreath is successful there is a certain chance that a piece of your eq will be burned ! It will start with your inventory, then your shield, weapon, robe, head, plate, pants and finally the boots.