Rules lookup
Find a card to read its official rulings and keyword reminders, or search the rulings text itself to settle a tough call.
The Commander format →
How Commander actually works: exactly 100 cards, one of each, colour identity, the command zone and commander tax, and the two numbers that decide games — 40 life and 21 commander damage. Written in plain language with the Comprehensive Rules reference alongside.
Commander banned list →
What's banned right now, grouped by why — the power-level bans first, then the conspiracies, ante cards and dexterity cards that get lumped in with them. Tracks Scryfall's legality data, so it follows changes on its own.
Settling a play? Browse the tough-rulings guide → (layers, state-based actions, combat, Commander rules), or read up on a mechanic → (Exile, Indestructible, Overload…).
Building a deck? Browse cards by what they do in the Card Finder →, or paste a list into the deck analyzer → — free, no account needed.