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Accept Quest from Head of Onyxia
Locate Head of Onyxia in Orgrimmar to accept this mission.
Take the Head of Onyxia to Thrall in Orgrimmar.
Locate Head of Onyxia in Orgrimmar to accept this mission.
Take the Head of Onyxia to Thrall in Orgrimmar.
Return to Thrall in Orgrimmar to complete the quest and receive your experience and rewards.