Quote Originally Posted by Cleretic View Post
Okay, answering the questions basically in order. Some of these will cover the same answers.
  • Just the planet we're on got sundered. Also the moon, probably, when exactly the moon started existing is still an open question, but the shards definitely have their own moons.
  • It isn't completely clear how the Nier raid people got to the First, but the Seeds of Destruction (and I believe the Ark) can cross dimensions so it might be a 'them' thing rather than something anyone can just do.
  • No plausible examples to figure out if/how someone gets to a shard via external travel rather than the Source.
  • Midgardsormr just got to the Source; no idea why he didn't hit any other shard, but nothing really suggests that he did anything special, so the Source is probably the 'default'.
  • We probably can't do shard travel by doing a return space trip, but that's on Y'shtola to figure out.
  • Thaumaturge spells do not tap into the void. Neither do Black Mage spells. Thaumaturges use internal aether and black mages use the aether of the world around them, so both of them work just fine as far as results go no matter where we are, although if you wanted to get really, really fiddly on how aether works, there might be other story there. (The writers will not get that fiddly on how aether works.)
  • How everything works in Ultima Thule is a separate interesting question, because it's basically a space that isn't made out of conventional matter and energy. The best we can reckon, everything there is made of and powered by dynamis (and given a bit of Thancred-help to take interactable form), so all forms of combat work just fine with it. But the Reaper's Avatar is making one hell of a trip to get there.
Hydaelyn created the moon specifically as a prison for Zodiark. I'm guessing this planet just didn't have a moon at all.