First... complete AF1 Not sure if you need AF2 completed as well. Then talk to the two Galka inside the Armorshop in Upper jeuno. Head to Eldieme Necropolis and find a coffer key. They drop off Tomb Mages, Tomb Warriors, Spriggen, Haunts. Find a Coffer and open it with the key. Next, go back and talk to the two galkas in the armor shop. Then head to the Tenshodo in Lower Jeuno and talk to the Mithra inside. Next Head to Port jeuno and examine the crates outside of the duty-free shop (next to the Auction House people) Then head to Castle Zvahl Bailey's with a minimum one of 1 group of lvl 55s and fight the Dark Spark. Return to the crate and examine again.