Commander
The most popular casual format. Build a 100-card singleton deck led by a legendary creature — your commander — whose color identity defines every card you can play.
Deck size
Exactly 100 cards (including commander)
Copies
1 of each card (except basic lands)
Key rules
- Choose a legendary creature as your commander
- Your deck's colors must match your commander's color identity
- Start with 40 life
- Commander damage (21 from a single commander) is lethal
- Multiplayer by default — typically 4 players