Me: Okay, the Phyrexians invade the Multiverse. How many planes do they attack?
Them: All of them.
Me: All of what?
Them: All the planes in the Multiverse.
Me: Aren't there an incredibly large number of planes in the Multiverse?
Them: Fine, they attack all the planes we know about.
Me: But how many planes will we see in the actual set?
Them: As many as we can.
And THIS is why the set wasn't received so well. Who are "them?"
Jin-Gitaxias would never have gone along with such a poor invasion strategy.