Even if you only have a few tokens, this expensive yet cost-effective buff could easily end games
It also copies your stuff and then strips away legendary status, but it also gets the best form of evasion in flying
Pitch an Ultimate Green Goblin to Thrill of Possibility, and it's almost like you drew three cards without having to discard anything meaningful
This doesn't guarantee you a gold/crown card, but it does increase the chances of it giving you a gold card to 3.846%
Once you get back to your turn, you can do whatever you like, then use Sundial of the Infinite to end your turn before you die, and then repeat the process when your opponents go to play their turns
But as Wizards discontinued the more game-breaking cards from future print runs and gradually reduced the strength of new cards, the status of that original, arbitrary group began to acquire a historic weight they became THE Power Nine, embedded in the games earliest, pioneering era