Quote Originally Posted by Fenral View Post
There are several references in-game and in the Encyclopaedia Eorzea referring to Xande's tomb in Mor Dhona. There's even concept art. G'raha's search for said location is also mentioned in the Eureka quest series, as something unconnected to the primal Eureka on the Isle of Val.
Xande's Tomb isn't a mystery. It was a named location in 1.0 that you could visit, a crystal cave in Mor Dhona with a bunch of crystal stalactites and stalagmites pointing towards a bigger crystal pillar in the center with a decoration around it. The description of the tomb in the EE describes the exact same place too. Then later, Erik from the monk quests says that the Crystal Tower is in fact Xande's Tomb, and we already know that's what G'raha was looking for when he was in NOAH.