Instead of each player drawing seven cards, youll draw seven plus one for each other player
In online gambling, the randomness of shuffling is crucial, and many sites provide descriptions of their shuffling algorithms
Vintage Lurrus was essentially free if you had a Black Lotus as you could replay it after using it to cast Lurrus
Most players of this format want a laid-back game of slinging spells, slowly gaining advantage, and let everyone at the table "do their decks thing." There are some Commander players that want to push the format to the extreme and try to win as quickly and efficiently as possible
Since Rooms are an enchantment, most of the decklists are either Rooms or cards that support enchantments
It's gotten to the point where the best decks when the TCG started some 15 years ago (like Haymaker, for example) would be absolutely unplayable against ANY legal deck today that has seen any play