Overall, "Performapal" is one of the strongest decks ever created, and its reign on the meta was a frustrating time for players
That being said, I don't have that same luxury with the more obscure decks so generally speaking, unless there's a lore specific reason of limiting cards to certain quantities due to their uniqueness (for example only 1 copy of each Crystal Beast existing), 2 or 3 copies are acceptable in order to preserve the feeling of the deck as it appeared in the anime
You're dealing with different sets, different card quantities, and varying purchasing fees
The designers had created a story that they wanted to tell, and they designed the cards in the set around that storyline, often resulting in a unplayable or weak cards
Dante, Traveler of the Burning Abyss Dante is an amazing card for Burning Abyss decks, but it also works fantastically in any deck that likes to mill cards
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