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BCNM stands for Burning Circle Notorious Monster. It is a special type of arena battle in Final Fantasy XI that allows adventurers to fight a set mob or group of mobs.

Unlike most areas of the game BCNMs only available to you and/or your party/alliance.
Don't throw away your beastmen's seals! You can trade them for orbs that will allow you to access a BCNM!
by Berra June 19, 2005

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