I know the rules for what happens when an aura that wasn't cast enters the battlefield - that aura's controller chooses something to enchant with it, and this doesn't target that something.
However, I'm confused as to what would happen if I had, for instance, a Market Festival enchanting my Forest, and then copied that Market Festival with my Mirage Mirror.
My first thought is that it would instantly fizzle with nothing to enchant since it's not entering the battlefield, and whatever a permanent is enchanting is not a copiable value of an object. Or, am I wrong in that I would get to pick a different land and enchant that with the Mirage Mirror copy? Some clarity would be greatly appreciated!