There is a room that has a monster with a boxing glove. He will punch you and if he hits you with a windup punch, he send you flying back to the start of the dungeon. You must beat the living hell out of him, after doing so, go north and you see a chest. There may be blocks blocking it, or they may be down, it depends on which orbs you hit earlier, if they are down, HUZZAH! A flame rod for your efforts! If they are up, boohoo, you must go back, change the orb and then come back again.
good luck!