Like in prerelease tournaments, participants compete in a Sealed Deck environment, utilizing the new cards
Effects that start with At the beginning of your end step can be ordered as you like, so if I have Ocelot Pride, eight other permanents, plus one mobilize token, I got my city's blessing during combat, so the Pride can make a new warrior token
Spreading Plague
Beyond that, Commander players run all kinds of low cost artifacts, like Sol Ring, in order to give them access to additional mana early
With that in mind, if a scene existed in both games, we had our choice of showing it as the original game did, how the modern version interpreted it, or a unique fusion of both
Mickey Mouse Detective is a great example of this, allowing you to put the top card of your deck into your inkwell when played