To see what exactly that deck was made out of, you can see our Disney Lorcana best decks article
I wouldnt have been able to pick just one
Play boosters Like most Magic sets, MTG Final Fantasy includes Play Boosters
You dont have to use heroic to give it counters either: its stats are great for an Ezuri, Claw of Progress deck, and that commanders experience counters give another avenue to pump up your Sage
Its synergy with classic Tron staples like Karn Liberated and better, newer cards like Devourer of Destiny is ridiculous
Yes, there's always a chance that you can combine two beloved things and make something unbeloved, but we take chances all the time on new mechanics, and this seemed well above any bar of risk we had to clear