It stands for Elder Dragon Highlander you build a 100 card deck that only has 1 copy of any car other than basic lands. You have one Legendary creature that is your commander that starts in the command zone and the deck can only contain cards that contain the same color as your commander. http://dragonhighlander.net/rules.php
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bigman29 it is an edh deck they have to be 100 cards exactly.
this is my first try at building a commander deck please give me some input thank you.