For Challenge # 121. What Megamorph really should have been. Admittedly, it doesn't make as much sense in Tarkir (if your deck only packs one normal morph, and one gigamorph, then your opponent knows which one is what.) Seems like a good idea for it's own set, though. And only really works as a red/green mechanic since your allowed to go big in those colors (though the rest of the set would have to support it.)