In this case, the cards no longer need to look and feel like originals, only the proxies need to be equal to each other in the above characteristics
You wont be doing any infinite loop shenanigans with Maha, its Feathers Night and Night of Souls Betrayal, but your opponents will never get a creature into play
You can rewatch this video to see this: The artwork of the cards on the back of the box that either feature: Grass Energy, Charmeleon, and Fire Energy For Bushfire Grass Energy, Ivysaur, and Water Energy For Overgrowth Fighting Energy, Onix, and Water Energy For Blackout Lightning Energy, Pikachu, and Psychic Energy For Zap
Furthermore, Grist can grind out an endless stream of blockers or threats while being difficult to remove using cards that are normally good against creature decks (Prismatic Ending and Unholy Heat aside)