I don't remember what was the orb supposed to do again? Why did he create it?

I think it’s meant to make the dragon’s mate immortal? Or maybe just make them live as long as the dragon does

Ok I remembered something like this but I thought it made him go back to a time where he hadn't met the dragon and couldn't figure, now I get he's actually still unconscious and Hyo-un is trying to revive him, thanks.