Beta Zones

Zone #6852 (possibly named "수련의 장") doesn't exist. It may have been removed from the game.
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Proving Grounds - Live
Proving Grounds - PTR
Proving Grounds - PTR 2
Proving Grounds - Beta
Proving Grounds - Classic
Proving Grounds - Burning Crusade
Proving Grounds - Wrath of the Lich King
Proving Grounds - Cataclysm