Commander

In commander you have an exactly 100 card deck. The format is designed for 3-5 free-for-all players and you each start at 40 life. You are limited to 1 copy of each card in your deck. Additionaly you have a comander card, this is part of your 100 but is not placed in the deck but above and can be cast at any time. The colour of the cards in your deck must be limited to the colours of your commander.