I got this quest prop called Sky Jade. I got it from the Illusion place in egypt.Can some one tell me what ts for?

The one you got after speaking to one of the goddesses? Where you have to first navigate through a flooded cave with bats?

That's for the fairy skill quest. A hard quest, I believe.

You can check e.g. this guide at http://forum.wl.igg.com/viewthread.php?tid=23695 .