This is just a card that will destroy the meta. This card is too powerful because it add by himself, a new way of winning. Therefore, the pokemon TCG will be changed. Look at now, we have three ways of winning the game, and usually, we win by taking all the prize. If this card comes in play, no need to kill some pokemon! Gengar Prime+Palkia G Lv.X! Win in 3-4 turns! Bad for the meta.
And if somebody says that it should be an Ultra-Ultra Rare, well, it will affect more the Meta. It will become like Yu-Gi-Oh!, where the player with the most of money wins. That guy will waste 2000 dollars to build a Lostgar Deck with each Lost World as 200 $.