Originally Posted by destruya
We're talking about two completely different "sky dungeons."
You aren't able to land on the "barrier" island (the Sword of the Heavens) until you've defeated Safario and learn who "Black Cloak" is. Then, for some reason, the airship is "capable" of landing there. You're probably looking for the second largest of the sky islands, where you get the Spirit Crystal of Light.
The sky dungeon I'm talking about is the smallest of the three sky islands which contains the hardest post-game boss.
Good call.. i feel dumb. So i 1 shot the dragon there though it is easily the hardest boss yet. I think a lot of us have a ton of experience in jrpgs so that's not that shocking. The guards at the castle (17k hp bosses) are a joke if you use poison.