I would say a permanent with pretty high
or
cost.
However, I remember somewhere that Zanzarino doesn't really like the idea of 'bringing creatures back to life' or having to code the 'discard pile' so that creatures can return.
Even so, this card might be okay, as it seems to be a card between parallel universe and mitosis.
So when a creature is killed, its original form (any additional skills are deleted, such as BE or overdrive) is returned onto the field for the cost of the original creature?
What happens to mutant creatures?