The 75 percent rule is a popular community-created deck-building philosophy specifically tailored for the Commander format. It suggests constructing decks that are optimized and powerful enough to remain competitive and win a fair share of matches against diverse opponents, without being overly oppressive, unfun, or reliant on hyper-competitive fast win loops. The core ethos encourages creativity, balanced social interactions, and adaptability so that games remain engaging for everyone at the table.