7-11 is a fast-paced format, designed to provide unique gameplay during the inevitable downtime during a traditional Magic tournament. Even if you are the only one with a set of 7 decks built, you can just hand one at random to a friend between rounds and play a quick, 5-minute game.
Old School 7-11 follows the Pacific Old School Rules with the following exceptions:
Players build 7 unified singleton decks of 11 cards each. Unified singleton means that, if you shuffled all 7 of your decks together, the resulting 77 card deck would have no duplicates except basic lands.
There are no sideboards in Old School 7-11 and the only cards banned are the ante cards.
A match of 7-11 consists of 7 games. At the beginning of each game in a match of 7-11, each player randomly chooses a deck they have not yet played.
There are no mulligans in a game of 7-11.
A player who attempts to draw a card from a library with no cards in it does not lose the game.
If a game cannot be won by either player, it is a draw. After 7 games, if the score is tied, the recommended tie-breaker is to shuffle all 77 cards together and play games until a winner is declared.