The only difference between morphed cards and megamorphed cards is that when a creature with megamorph is turned up for its megamorph cost, it gains a +1/+1 counter
Cards like Gray Merchant of Asphodel will punish opponents in the late-game with extensive reach, fueled by a card like Bolass Citadel
Note: While I never delved too far into the Final Fantasy video games, I did play FF8 when it released (that opening cinematic blew my mind as a lad), and I nearly beat FFX , but was derailed by a crippling BlitzballBlitzball addiction even without the Jecht shot
But if you just want to make a version of your favorite commander with an image of your pet or something similarly sentimental, or you want to see your idea for a custom card come to life, card makers are just what you need
In this case, however, the term "proxy" may no longer be applicable, as these cannot be considered substitutes for existing objects