I need help I am trying to look for the key stone but how has it and where is it?

if u know can u help me and tell plz

The keystone is on the ocean floor somewhere. If I remember right it is like to the east??? It is an alcove somewhere so start exploring and I guess this might be a *SPOILER* DO NOT GO BY THE BIG GUY BECAUSE HE WILL KILL YOU!!!!!!!!!

Originally posted by Landlord of Sector 7
The keystone is on the ocean floor somewhere. If I remember right it is like to the east??? It is an alcove somewhere so start exploring and I guess this might be a *SPOILER* DO NOT GO BY THE BIG GUY BECAUSE HE WILL KILL YOU!!!!!!!!!

That's the Key of the Ancients... About a disk ahead of where he is.

When you're travelling from the Gold Saucer down to Gongaga (or whatever that small village where Zack comes from is called), there is a solitary hut located on the east just after you cross the river with the buggy / Tiny Bronco. If you head in there before you get Cid, no one will be at home. However, head in there after you've obtained Cid and the Tiny Bronco, and someone will be there to inform you that he has sold the keystone to some muscle dude (aka the owner of the Gold Saucer.) Head there, and go to the battle square, and the exhibits shown in there. Et voila!