In my experience, the Game Changers that win the most games are the ones that generate persistent card advantage: Rhystic Study, Smothering Tithe, Necropotence
Mogis, God of Slaughter deals damage unless opponents are willing to sacrifice a creature, Fate Unraveler deals damage whenever an opponent draws a card, and Blood Seeker deals damage whenever an opponent plays a creature
Aerodactyl is great fun if you want to win without doing any damage (no, seriously), the promo Mankey makes Primeape a valid counter to Pikachu ex decks, and Im constantly trying to cook up something Darkness-flavoured to deal super effective damage to all those pesky Mewtwo ex decks I see
If it ends up being a Psychic Pokmon, you can put it in your hand
FLESH AND BLOOD TCG: Arcane Rising Booster Box [1st Edition] Legend Story Studios There is a darkness spreading across the land
Azelf, Mesprit, or Uxie