tapu bulu pokemon card - 006/064 - Shrouded Fable end display Tapu Bulu - 006/064 6

They're more useful in this format than most, simply because Commander decks are so large, and each of their 99 cards (excepting basic lands) must be different

Your opponent controls their Hidden Strings copy

Melmetal (includes two foil promo cards featuring Mewtwo V and Melmetal V) Official English set description: Get Up & Go Battle

While some are fairly common, like ones that come with a magazine, clothes, like the Pikachu Illustrator card or the Magikarp Tamamushi University Promo Card, are incredibly rare

These are variants rather than a separate power level, but they drive much of the secondary market, since a competitive card's alternate art often outsells its base Secret Rare