|Common Drop||Rare Drop||Common Steal||Rare Steal|
|Lv. 3 Key Sphere||Lv. 3 Key Sphere||Ether||Supreme Gem|
The fight against this form of Sin is more of a race than anything else. At the beginning of the battle, Sin’s first three turns will be spent moving closer to the airship, while using nine more times to slowly open its mouth. Once the mouth is fully open and the Overdrive gauge is full, Sin will use Giga-Graviton to cause a game over. There is no way to avoid this or block it, so you will need to defeat Sin here before that happens. While Sin is far away, you can use magic, as well as Wakka’s physical attack, to deal damage.
Also, if you happen to have any Overdrives full for Aeons, you can also use those. Once Sin is up close enough, you will really need to pull out all the stops. Before anything else, you will want to use Armor Break, as Sin is armored. If you didn’t cast Hastega/Haste on your main party, then do that to give them more turns. Note that Sin does have a counter in this bout, usually after striking it a certain number of times. That counter is an attack that hits the entire party for damage, while also possibly inflicting them with an ailment. There are three variations of this attack, with the ailments being either Petrification, Zombie or Confusion.
Zombie is nothing to worry about, as Sin won’t use healing spells. Confusion and Petrification, though, are bigger problems, so hopefully you either have some protection against them or quickly use Remedies to get rid of the ailments. Since it is possible to save before this fight and actually visit other locations, it’s not a huge problem if you can’t bring down Sin here. If you can’t, then that just means you need more damage.