Hmm... The unupped seems ok to me in terms of balance. Does the +2 attack buff stack? If it does, then I think a higher cost and according stats would be good to prevent fractal abuse.
The upgraded version is a little odd. If I'm reading it right, it would allow you to continually buff the attack of all creatures. This will probably be OP. Particularly if used combined with fractal.
Also, the mechanic is sufficiently different from the unupped that you should probably give it a unique name.
Balancing and fractal / mitosis abuse aside, I do think its a pretty cool card idea.
I find it interesting that you chose
for the duo... I would have thought to use
myself, but air seems to fit well with the flag concept.