It isn't that easy, actually. That stupid FATE in Southern Thanalan keeps glitching in a way or another. A couple of times the Sync button didn't appear. Another couple of times the mob didn't show at all. Eventually I've found out that going under where it is supposed to be its belly it showed up. When I did it successfully in Central (?) Thanalan and successfully beat the FATE it said that it was unable to give me the item. It is simply a mess, I am honestly getting quite sick of paying for something that doesn't work.