[quote=@Ogobrogo]
<Snipped quote by Zoldyck>

Well it's about time someone guessed it. But wait a minute... WRONG! Watch it, boy, you've only got two more guesses.
[/quote]

Ooh wait, it was the fourth door that opened so... Is somewhere in there?

Although that would be way to obvious.

The other thing I could think of was him being locked up in the mirror which is a coupletely mirrored dimension, like in the movie Mirrors.

Those are my guesses. If it's anything else then I wouldnt know how we would be able to find him... I'm probably missing something obvious...