The kidnapped guy from Nabdur is a beastmaster (the new faction), also trying to get to Belynar because the had prophecies telling of a new beginning to occur. They lived on the islands southwest of Cyradon, outside the Veil, and assumedly have the same origin as the Orsai, only they didn't stay on Anias. They travel by great, flying tortoises that they breed, just as they breed and train many different animals (hence the name beastmasters), which is usually very reliable. The crah of the Tortoise that the guy was on made it possible for the harpies to chance upon the people, kidnapping the guy.
The crash, though, didn't involve that much chance - a Cyrad wanted someone to explore Nostin soon, because it's the one place where the Cyrads know a Tear of Life to be. I felt that a very slight intervention (a tortoise dropping from the sky) would be a nice way for the Cyrads to influence events. If this hadn't worked, they would have tried something else, but it worked...
How the tear of life came to Nostin, and how exactly it is hidden/ protected there, is very interchangeable, of course. Looking back, my way of doing it was maybe a little overdone, because I introduced another NPC, who stayed near the well-protected, unmovable Tear.
The story I put behind that guy was that a powerful Narsi lord commanding many a living thing (vivamancer) had his summer house in the mountains reachable through Nostin, and he gained possession of a Tear of Life. Tourgorn, his slave and lackey, a Shival Elf, killed him one day, but unfortunately wasn't able to take the Tear, so he had to stay at the place of his murder, because leaving the place would kill him. 500 years of boredom didn't leave his mind quite intact... . Additionally, his body isn't quite intact either: The Narsi lord, just before he dropped off the cliff, tried to bewitch Tuorgorn, but missed with the spell - after that, Tuorgorn's feet had turned to tree roots, trying to grow into the earth whenever Tuorgorn stands still.
I found that a very tragic figure. Guilty of murder because he wanted to live forever, now challenged with the choice of infinite boredom or slow death, unable to remain still else his own body captures him (a constant reminder of his victim, his former lord). Tragedy!