Indistinguishable on the back [edit] The main issue to guarantee fair play in a card game is that all cards in the deck must be indistinguishable for any player who does not view the front side (if card sleeves are used, the term 'card' means the sleeve with the card inside)
Curiositys greatest strength is that it's affordable and easy to get out on the field
Standard, for example, is a rotating format, meaning it only allows you to play specific cards that have been printed in recent times
Later in the game graveyards will build naturally and cards may not need to be sacrificed
So, in this case, if a player has less than 13 creatures, they sacrifice as many as they can
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