While this is risky, it allows him to play stronger cards for only 1 DON!!, and combined with other card effects, the player can gain a huge advantage
A Manga Rare version and a Common version of the same card are equally legal
May contain Foils, Mythic Rares, or Planeswalkers
Hope this little guide can help understanding how omnipresent are those fakes
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And as that is a +1 loyalty ability, you can just keep doing it every turn for as long as Oko stays in play
