I'm currently making a new version, with each The One replacing every possible The One already on the field (yours and your enemy's too, adds some spice) and absorbing the stats of the replaced as a bonus. It will thus ignore other types of creatures, which makes it more like Zblader's old version of his Samurai.
I am now hesitating between giving it:
-Immaterial only: screwed by pretty much any shield, can't be targeted with buff spells or Fractal.
-Momentum only: could be unfitting theme-wise, but well,
has a Seraph? so maybe
can take other element's things too?
-Immaterial and Momentum: can only be killed by the owner casting Chimera, would make it pretty dangerous after a few re-casts.
-Immaterial and something else... the point would be that this dude is a force to be reckoned with, not something you can get rid of with your everyday CC.
Alternatively i could focus on the part where he can really only be the only creature on your side at any time, but i tend to lack room in card text for both this and the stronger-with-every-cast part. When i try to merge them together it just looks like a
Chimera.
PS: just saw OldTrees' post. This research is taking longer than i thought, (i guess i'm doing it wrong) but i've seen a few instances of use of Grandeur in the process so i'll just use that.