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)
Tug of War brings that back, in a sense
This means you've now reached a total of 15 power/toughness for your six mana investment
Temporal Forces also has a lot of really awesome designs, along with plenty of Gengar cards if you like to collect Gengar
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
The way Yanmega ex works is that its Buzz Boost ability lets you search your deck for three Grass Energy and attach it to the card when it switches from the Bench to the Active spot