When you enter a certain room, you will get transported to another dimension. Three heads will attack you at different times. Keep dodging the things that they fire at you. When they get close, before they attack, use the most powerful sword you have. Do this to get your Devil Trigger up, but do not use it until the heads join up. Then, either use the throwing daggers or the handguns. Repeat until they are defeated. Note: When the ice head uses its main attack which fires huge ice pillars at you, you cannot attack the heads until you have destroyed the pillars.