all game changer cards mtg is:gamechanger · Scryfall Magic: The Gathering Search Updated Gamechangers list : r/EDH

Each Collector Booster includes one rare or mythic with extended art, one foil mythic or rare, nine foil commons and uncommons, three special-frame cards (like showcase frames and Gilded foils), and one ancillary card (from a planeswalker deck or Commander deck, typically)

Prison builds love for her because she generates value while locking boards

While Im not sure if it truly makes the cut in cEDH, you could also cast Return the Favor to make your own copy of the enters-the-battlefield ability of Thassas Oracle to win on top of their ability on the stack

However, the returns calculated in this analysis match closest (after estimated costs) to the S&P 500 Index during a similar period

If the token is a copy of a creature whose power and toughness are defined by an ability (usually printed as */* or similar), the token doesn't copy the ability that defines its power and toughness