Spell #89703 (possibly named "Anti Magic Zone Cosmetic Green Giant") doesn't exist. It may have been removed from the game.
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Anti-Magic Zone (Cosmetic, Green, Giant) - Live
Anti-Magic Zone (Cosmetic, Green, Giant) - PTR
Anti-Magic Zone (Cosmetic, Green, Giant) - PTR 2
Anti-Magic Zone (Cosmetic, Green, Giant) - Beta
Anti-Magic Zone (Cosmetic, Green, Giant) - Cataclysm