User blog comment:Dark Doctor/Immortal Marco/@comment-3119203-20110316051046/@comment-3297457-20110316090832

true but marco´s blue phoenix flames can heal any physical damage so maybe they can heal damage done by time as well, thus extending his life indefinitely (just a wild guess). i also believe marco can't catch any deseases, as his df powers would automatically protect his body. so it just might be so that he can only die by battle. i have always wondered what would happen if someone would cut off marco's head or stabbed trough his heart. would he die from the damage before his df could kick in or would his powers just heal him? i know kizaru shot him several times but i don't think he hit his heart.