The Giant of Bal-il
- When you return to the earth, you will discover that you are too late. And the Giant of Bal-il will appear and start causing destruction. Your friends will all appear and start to battle the giant. Cid will bring your party to the giant's mouth.
- Make your way through the giant and just after the save spot, you will have to fight all four fiends over again. Use fire, ice, and lit magic to defeat them quickly.
- Continue on to its core and fight the CPU. First destroy the Defender but leave the attacker alone. If you destroy both, the CPU will restore them. After the Defender is gone, concentrate your attacks on the CPU and eventually it will be destroyed.
- Golbez will appear and FuSoYa will break Zemus' control over him. The two will go to the moon to confront Zemus.
The Core of the Moon
- Enter the Big Whale and return to the moon.
- Enter the Lunar's Lair again and go into the back room with all the crystals. Speak to all the crystals and then step on the tile in the middle of the room to enter the core of the moon.
- You can find the most powerful weapons and armor in the subterranean levels of the moon. You will have to walk across an invisible bridge to find the Crystal Sword.
- Continue down to the lowest level and you arrive just in time to see Golbez and FuSoYa defeat Zemus. Zeromus will be born out of Zemus' death, however, the throw your party back. Golbez and FuSoYa will attack him but they will be defeated. Your friends back on the earth will wish for you and you and your party will regain your health. Use the crystal you receive from Golbez on Zeromus to reveal his true form. Fight him will all that you have to defeat him for good.