Quote Originally Posted by Iscah View Post
The rift does not take G'raha from one timeline to another. It takes him from the Source to the First, both of which exist within a single timeline.
I'm aware. But, the combination of the two forms of travel seems like it resulted in a completely different form of time travel from what is normally displayed in the story, where there is otherwise one single timeline and all backwards time travel merely results in a causal loop. This appears to be why the Ascians take such an interest in G'raha, because to their knowledge his form of time travel shouldn't be possible. Since the Interdimensional Rift is something that has historically connected parallel worlds in FF, it may be G'raha did more than just hopping a shard and going back in time.