There are 4 other jewels hidden with in the lands.But they are guarded by large demons that give you a mission.Finish the mission for the demon and you get the jewel.When someone has one of the jewels the demon vanishes.
This jewel gives you the power to live longer
This jewel gives you the power to Fly
This jewel gives you the power to kill one person on the site
And this jewel gives you the power to bring back the dead