"1 tatoo" whatever. I knew it was some number, I just guessed "2." :P

Well, that's about the time, I imagine, that Sephiroth goes to the Temple of the Ancients, if I remember correctly. Maybe he just wanted to know about the Keystone for...er...some reason? Well, two possible reasons, actually:

1. He wanted to tell Dio not to give it up.
2. He instructed Dio to give it up. Meh

Cloud: yes, that is very random. Hehe, it's very interesting, and you could make a really cool story out of it, but it's pretty doubtful.