How do you complete undead level tenchu xbox

it depends if you are playing ayama or rickimaru if rickimaru get lots of health potions and rebirth items then get stealth kills the whole time lose the least amount of life as possible. later you have to fight a hoard of them after a while a door will open from were you came run back to the black smith and the mission is over. if ayama you do not get the swords until the end follow the map and destroy the stones to open doors when you get the swords you must fight a boss when you beat him you finish the mission