The name was supposedly made to have a name long enough to span the length of a Magic card
So Pokmon TCG sets in recent years have been built of your regular cards with the small window of art, Double Rares that are either the older basic Vs or the more recent basic ex cards, Ultra Rares which tend to be more elaborate V/ex arts or full-art Trainer cards, then the desirable Illustration Rares (IR) which are full-art cards depicting Pokmon in their environment, followed by Special Illustration Rares (SIR) which also full-art, but mostly far more elaborately detailed
This card engine is a bit more restrictive than Bolass Citadel since you need sacrifice fodder to get your cards rolling, but should you succeed in doing that, Yawgmoth becomes a card capable of taking over entire formats
Collectors quickly fell in love with its mix of secret rares, special alternate arts, and the potential for God Packs
Later, Yuya is surprised that Mieru sets a monster in face-down Defense Position, a nod to the fact that since GX nobody ever set a Monster Card in face-down position (again, barring ZEXAL )