In my experience, the Game Changers that win the most games are the ones that generate persistent card advantage: Rhystic Study, Smothering Tithe, Necropotence
(2024-02-02) Any time you have priority, you may turn the face-down creature face up by revealing what its disguise cost is and paying that cost
Felidar SovereignFelidar Sovereign When this 4/6 Cat Beast for with vigilance and lifelink was first printed in 2009s Zendikar expansion, Wizards of the Coast was not designing cards with the Commander format in mind, and the first official Magic Commander product didnt release until 2011
Then, at the beginning of the players upkeep, then return a creature from the graveyard to the battlefield
If that creature has infect, Burn the Impure deals 3 damage to that creatures controller
Open the box and divide the cards.