Spell #308482 (possibly named "Permanent Feign Death Stun Untrackable Immune Wadead03") doesn't exist. It may have been removed from the game.
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Permanent Feign Death (Stun, Untrackable, Immune, WADead03) - Live
Permanent Feign Death (Stun, Untrackable, Immune, WADead03) - PTR
Permanent Feign Death (Stun, Untrackable, Immune, WADead03) - PTR 2
Permanent Feign Death (Stun, Untrackable, Immune, WADead03) - Beta