yugioh card necklace Yu-Gi-Oh! Millennium Gold plated finish Big thanks to @kingice for

The next set, Jungle, only had a meagre 64 cards

The same is true of the delve mechanic and the Phyrexian mana mechanic, and while neither of these mechanics ended up needing to be banned while in Standard, both are right on the border, and one slight miss could lead to major problems and bannable cards

[1] Pokmon decks are exactly 60 cards, but you can adjust how many cards of each type you have to better fit your play style

Flair allows you to upgrade your card, no matter what card you get, even cards already considered holographic in normal terms

It also keeps your opponent guessing as to your plans, or allows you to shift (pun intended) your plans on the fly to deal with your opponents current position