Come and let us know about it in the Wargamer Discord community.
Do you have a particular Commander card to suggest for us to shine a future Spotlight on
Im going to quote Gavin Verhey from the article that I linked up above: Game Changers dramatically warp Commander games, allowing players to run away with resources, shift games in ways that many players dislike, block people from play, efficiently search for their strongest cards, or have commanders that tend to take away from more casual games
Its a low-cost way to give your creatures flash since it also happens to be a useful mana rock
Also note that you cant play lands, since it tells you to cast the card
(5/3/2019) If a permanent leaves the battlefield this way but ends up in a zone other than a library (most likely because it's a player's commander in the Commander variant), it's still counted to determine how many cards to reveal.