*makes fractal pharaos*
I think the reason most CCG don't have too many creature spawners, or cards that make new creatures of nowhere, is because those require several token cards (MtG does anyway, but it is because they never seem to sell enough and want you to expend extra money on those pretty tokens).
But this being a virtual game is different.
A creature that comes with mitosis doesn't sound that bad, albeit it wouldn't be easy to balance, since daughters would come with mitosis too.