Question about recruiting a certain character in the World of Balance

I saw in the 2.7 patchnotes that you can recruit Reaper in the WoB after the floating continent appears. I have tried finding it out myself in the current patch but am having no luck. Has it something to do with the graveyard or ball creature in Lunaris/Thamasa? Other than the Tonberry and Big Daddy fight in Rogue City/Zozo, I think I have checked everywhere else. I would appreciate any help. Direct answers are fine.

Managed to find out in the end. Should have known that it was one of the two things I had not done. For anyone reading this in the future, you have to beat Big Daddy in Rogue City/Zozo to get into the graveyard in Thamasa/Lunaris.