The problem is it requires
and
to be effective, in both of these there are many cards which are by far more effective I seriously believe that you end up paying way too much for a worse creature...
Leave it as 0/11, it just occupies space and does nothing
Change it to 10/1 = 6
10
, amethyst dragon is the better choice here
Change it to 7/4 = 6
+ 7
you could just as well play a phase recluse and save 9 quanta
The unupgraded version is even worse off, it ends up paying the equivalent of 2 amethyst dragons and a twin universe to gain a single 10/1 creature
I think the card idea is nice, being able to vary your stats however you need it is a nice mechanic but the card is certainly UP and I suggest you make it a little bit stronger
I suggest decreasing its cost to 5
and letting it gain something like +2/-2 for 1
(unupgraded) and change the upped version to gaining +2/-2 but with 15 hp
This way for 10 quanta you end up having a maximum of 10/1 unupped and 14/1 upped which to me seems a fair price