This same holofoil was recently used by Magic the Gathering for their "Energy" cards
As for the cards themselves, well, take a look: In total, there are 224 Player Cards and another 133 Scenario Cards
If I am not mistaken, they are still limited in 2024, even if I think that they wont cause that much harm if they were released now, considering all the powerful decks that are in modern Yu-Gi-Oh
every Tarkir: Dragonstorm Commander Deck includes 2 Traditional Foil Legendary Creature cards featuring gorgeous Borderless art
Emrakul, The World Anew Likewise, Emrakul, The World Anew has had a variety of off-kilter and effective Protection abilities
They will be difficult to obtain, given their rarity, but hopefully not as impossible as another Pokmon TCG card from the Black Bolt and White Flare expansion