On stream, designer Carmen Klomparens said that the manga artwork might seem a strange choice to fans, but that it was chosen because the MTG Ravnica set War of the Spark was the first place Wizards of the Coast ever used manga artwork
I like Tifa better, but thats a personal thing, both are good
Regrowth is a nice one too, though the judge foil is beautiful as well
Let's take a closer look
The Soul Stones harness ability is a bit overblown given the massive set-up cost, but it's all gravy on a massive upgrade to Charcoal Diamond, and an indication that the other colors will be getting some improved mana rocks soon enough, probably a few as early as Marvel Super Heroes next year
Something along the line of a scannable code on cards to verify authenticity would get the job done, but implementing the program would be costly, and it wouldn't help with all the cards that are currently in print (barring some sort of mass-exchange program, which would be even more prohibitively expensive)