Final Fantasy VII Walkthrough
2.15: Diamond Weapon Attacks
The Diamond Weapon comes out of the water near the Northern Continent, and heads straight for Midgar. You’ll have plenty of time to get ready for the fight and choose your characters, equipment and materia. At least one of your characters should be equipped with the Steal materia, as the Weapon carries a unique weapon for Yuffie, the Rising Sun. Also, since physical attacks are not useful against it, you might want to consider taking with you characters that can equip weapons with double or (even better) triple materia growth, to take advantage of the good AP allowance you’ll get (Cid and his recently acquired Scimitar comes to mind).
Countdown, Diamond Flash
Immune to Status
Diamond Weapon is impervious to physical attacks (at least at first), so donít bother using your Limits if you have some ready. Instead, begin by casting Big Guard, Regen if you feel like it, and then start pounding on Diamond Weapon with your best magic and summons. Contain, Ultima, Comet and the various Bahamut summons will be your primary weapons. Quadra Magic will be a great help too if you have it. Donít forget to steal from the Weapon during the process though.
Once your opponent uses Diamond Flash though, the deal is different: if you had Limits ready, now is the time to use them, as Diamond Weapon is now vulnerable to physical attacks, and impervious to magical ones. When you reach this point, your opponent has not much time left.
When the battle is over, some FMVs will occur, and eventually you will be able to access the North Crater. But upon reaching it, Cait Sith will reveal that a serious threat is coming from Midgar.
The decision is made to return to Midgar, in an attempt to prevent another catastrophe.