To fill up your graveyard, Celes, Rune Knight and Mog, Moogle Warrior arrive with potent effects that get creatures into your graveyard, with the Celes also being her own wincon and value engine with her ability to grow your whole board every time a creature enters from your graveyard
But the specific combination of elements that FINAL FANTASY pioneered was massively influential in the development of the RPG genre
Though that flexibility is a benefit of the mechanic, it can lead newcomers astray into making non-synergistic decks simply because they're given more room to play in
In those instances, victims were also lured by unrealistically low prices for premium cards and asked to pay upfront
And because you can search for any Pokmon, not just a Basic Pokmon like with Nest Ball, you have a lot more flexibility in terms of what you can search for