mtg a deck can have any number of cards named Breaking the Singleton Rule in Commander The ANY NUMBER of Cards

Set a clear budget before you start, and stick to time limits

Thankfully, while obviously not ideal, this problem does have a fair few solutions

The guilds have also inspired a range of accessories and merchandise, including deck boxes, playmats, and tokens

Early game engine commanders like Rhys the Redeemed or enchantment-focused decks like Sythis, Harvests Hand and Tatsunari, Toad Rider might survive a few more turns because your opponents dont want to give you the card advantage when they destroy your commander

When you add in time for rolling and wacky effects, Planechase Commander games can take a while, too, so you should probably expect to settle in for a little longer than normal, though some of the new planes really encourage attacking and moving the game along, so maybe less than you might think if you're used to Planechase Commander already