Commander, as officially titled by Wizards of the Coast (also known as Elder Dragon Highlander or EDH) is a casual multiplayer format for Magic: the Gathering. It is a Highlander variant format with specific rules centered around a legendary creature called General or Commander.
Created and popularized by fans, the Commander variant is usually played in casual Free-for-All multiplayer games, although two-player games are also popular. Each player starts at 40 life, and each player’s deck is headed by a legendary creature designated as that deck’s commander. A player’s choice of commander determines which other cards can be played in the deck (while except for basic lands, each card in the deck must have a different name).