Okay, so double post, and my apologies for that.
I'm not certain what the lack of response to this card means. If people don't like the idea feel free to let me know, I won't be offended, and I'll know not to use up forum space with more ideas like this one.
On the off chance that the purpose & use of the card aren't clear allow me to offer the following:
This card basically allows the user to "reset" creature cards in play, returning them to their original stats and removing any debuffs etc. Any effect that changes the card type of a creature (mutation or hatching a fate egg) would cause a creature to be treated as it's new creature type, since I don't think the game tracks what creature a card used to be. After being affected by the fountain, creature cards are treated as if they were just played, and can't use abilities that turn.