The flowing water effects and Keldeos dynamic pose give the card a lot of movement, which feels perfect for a Pokmon thats all about agility and precision strikes
Ordinarily, MTG decks have to be 60 cards in size, which dilutes your deck, ensuring you can't consistently gain access to your best spells
As mentioned, they're original decks with their own cards (and their own set code, FIC), with actually little overlap with the main Final Fantasy set
The control deck itself, on the other hand, will become more and more powerful once its expensive spells and card advantage come online
Late game this becomes hard to use to much effect and you have little way to ensure you draw this early with something to use it on
This number drops to exactly three sticker sheets in Sealed, or however many you drafted in Draft