mewtwo pokemon card holographic (Holographic) 30 / 2 SWSH09 first edition mewtwo pokemon card

mana cost (at least compared to other creatures of the time)

Besides, who doesn't like playing all of their spells at instant speed

Your Mono-Black deck having issues with Esikas Chariot

All Black decks have access to Bojuka Bog and any deck can add Scavenger Grounds, and there are tons of efficient artifacts that hate graveyards like Soul-Guide Lantern

Just for the sake of being complete here, the Tropical Island card (also found in that video above) rounds out most top 10 lists but is not considered part of the Power 9

This version sees much less play than the rest of the cycle, with being particularly unpopular in formats where this is legal