Inspired by a comment of jmgariepy on Cardinal of the Holy Nimbus. The "can't be countered" is utterly vital to the card working at all. I did consider an alternative version which doesn't have that line and instead has another target to which it does something meaningless, like "Target player gains 1 life" or some such. But this version at least makes it a bit clearer what the aim is.

It might need restricting to graveyards, or perhaps exile. Because the prospect of trying to do this to something that's been shuffled into a library ain't a good one.

Other than that, I don't see why this should be like this. I mean, if you want to abuse the recursion by sacrificing the creature in response, for example, just use old Breath of Life. Ok, so this works with Mangara of Corondor.

Still, I think it's more of a "I designed this card because I know rules" than a card with a function. Which is funny considering the trouble there is with a creature going to a library or a hand.

Yeah... I don't think I know why I designed it either.

Even though the spell does resolve, it can't do anything to the illegal target, making it quite pointless.

It can't find the creature on the battlefield, but is it not able to look for the new object that the card became in the graveyard?

Either it's not the "target creature", in which case the card has no reason to look for it there, or it is the target creature and it can't be returned since that would involve doing something to an illegal target.

Fair enough. I think this can be deemed a thought experiment that didn't work out.