Originally posted by Da Pittman It just said that he was a mutant Inhuman.
There is debate because Black Bolt doesn't remember him
but as the story line goes he is a mutant so I'm counting that,
so the big "B" FTW
Actually Beyonder is neither Inhuman or Mutant, he's still a Cube being.
Beyonder implanted those false thoughts within X and company,
the next arc Beyonder appears in,
will give us insight into why he manipulated their minds into believing that.
This spoiler was revealed at Marvel.com,
although I originally guessed this when I noticed all the 2007 bios (after Illuminati)
state that both Beyonder and Owen Reece acquired their powers from the BeyonderS,
or simply put, they were and still are Cube beings,
except for Owen, who was once, but has now surpassed the level of Cube beings.