Go north, through two portals, and on the left is a Shuriken. Keep going, getting a HiPotion in front of the bridge, and an Ether1 just after. Head north to get some Yoichi arrows, and go back down and left to get an Alert. Go north into the portal. Above the portal is an Ag Apple, and head all the way right to get a SomaDrop. Take the middle path to get to the next portal. Head south and open the chest. You will fight a Last Arm. Win to get an Elixir. Continue along the path, making sure you save and heal on that blue orb. When ready, head up. When you reach the middle of the stairs, the Four Fiends will reappear. Rubicant will heal you, and then you shall fight.
Elements:
You fight them in order: Milon Z, Rubicant, Cagnazzo, and Valvalis. For Milon Z, use Flame for Edge, Fire 2/3 for Rydia and FuSoYa, attack with Cecil and heal with Rosa. Eventually Rubicant will replace him. Use Flood with Edge, Ice 2/3 with Rydia and FuSoYa and heal with Rosa. He will then be replaced by Cagnazzo. Use Blitz and Bolt 3 etc. Finally, Valvalis. Use Bolt and Blitz again. A berserked Cecil will do around 6000 to Valvalis.
Once you defeat them, go back, heal and save before continuing. Head into the core. An alarm will go off, throwing you into battle.
CPU, Attacker, Defender:
Attack the Defender first, or you will die very quickly. Then take out the CPU, or you will die quickly. Then take out the attacker. Not too hard, but keep healed, don�t use magic on the smaller ones. It may take a while, but once the CPU goes down, you�re free to unleash everything on the Attacker; even Bahamut.
After the battle, it will explode. Golbez will enter from the top, and FuSoYa will free him from Zemus�s spell. FuSoYa makes sure his memory is OK, and it turns out that Golbez is Cecil�s brother. FuSoYa and Golbez leave to fight Zemus. As the Giant starts to collapse, Kain comes to the rescue and leads the party to safety. After a bumpy reunion, Cecil orders Rosa and Rydia to leave the party. Once they do so, the party head to the moon. When you arrive, Rosa and Rydia surprise you! They stay with the party no matter what. You are now ready for the final challenge. But first, let�s go to Baron to get another summon � Odin.