Game Changers should generally be cards that easily and dramatically warp Commander games, allowing players to run away with resources, shift games in ways that many players find unpleasant, block people from playing, efficiently search for any of their strongest cards without downside, or have commanders that are highly unfun in casual games
Automaton can also benefit decks that arent tribal themed, like strengthening Talrand, Sky Summoners Drake tokens
The second and third abilities of Champions from Beyond don't care what happens to those creatures after you attack with them
It digs deep for a third land drop, hitting nearly 90% of the time in most decks and improving consistency across the board
So, if I sacrifice my [c]Inga Rune-Eyes[/c] to [c]Falkenrath Aristocrat[/c], then two things will happen
4 Splash for the Right Reasons (If At All) Not All Gold Cards Are Good Knowing when and how to splash a third color is one of the most skill-testing elements of Sealed deck building, and it is not to be done lightly