Ooh, neat. Nice little chance to expand on my character's backstory here, so lets begin.

1) If number 39 isn't available to anyone, how is it explained in-universe why a card people have never seen used and presumably never heard of is the figurehead of a whole House, representing the whole branch of XYZ summoning by itself?

2) What is the canon status of the Rank-up Magic cards? Do things like Astral force or The seventh one exist at all,  given that all of the monsters it supports are one of a kind and presumably their Ranked up variants as well? Probably just the Phantom Knight and Raidraptor support exist right now, but i'd just like to make sure of their canonicity

3) When you mention that Numbers cards still have a bit of power inside them, do people know this? Is this an accepted fact of the universe, that sometimes people playing a bunch of unconnected cards will suddenly act differently and go a little bit kooky? 

4) Does Exodius count as an Exodia card, or is it more common then that?