If you play an Elspeth, Suns Champion the turn before you play The Great Aurora, youll likely draw enough cards by shuffling the six tokens in that youll be able have a flipped Nissa and an Elspeth before you opponent can get a creature onto the battlefield
However, taking it all together, Relic is the best of them all since it can constantly exile a card from a graveyard and thus keeping it empty while also being able to exile all graveyards at once and draw a card from it
This means you've now reached a total of 15 power/toughness for your six mana investment
It is worth noting that even in Japan, the franchise is known as Pokemon (Pocket Monsters)
Originally believed to be UK-exclusive, it actually shipped to the UK, Australia, and the US, and famously corrected the long-standing Vulpix "HP 50" typo (which read "HP 50" instead of "50 HP" in the previous seven print runs)