What is EDH (Commander)

EDH is a format where players construct 100-card decks, with each card except basic lands appearing no more than once. The format is primarily played with four players, each with their own deck. Players also choose a legendary creature or Planeswalker to be their "Commander" (a Planeswalker must be designated as allowed to be used as a Commander, As shown in Figure A), which begins the game in the "Command Zone". Each player's deck is based and built around their Commander's color identity. In addition to the same losing conditions that exist in a normal game of Magic, each player starts the game with 40 life points instead of 20, and a player may lose if he or she is dealt 21 or more total points of combat damage from a single Commander throughout the game. Commander is most commonly played in groups of four, but can be extended to larger groups. EDH also has its own banned list of cards, separate from any other format.

A game of EDH plays like any other game, but you in addition can play your commander at any point of time. If your commander gets Killed or Exiled, then you may send it back to the Command Zone. Each time your commander is sent to the command zone, it costs 2g (two Generic) more Mana to play. The Command Zone is an area similar to exile, whereas the commander cannot be affected or affect the board (Unless it has rules text saying it does, as shown in Figure B) while it is in the command zone. Rules on mulligans are usually left to the playgroup on how many free mulligans you get, but the average is one.