This quest was marked obsolete by Blizzard and cannot be obtained or completed.
Return to Mathrengyl Bearwalker in the Cenarion Enclave, Darnassus.
You've learned what it means to cure poison without the benefit of spiritual aid. Remember what others must endure in fighting poisonous afflictions as you soon embrace your newfound power over poison.
You should now return to Mathrengyl Bearwalker in Darnassus, <name>. He, no doubt, has a very important spell to teach you now that the student understands the lesson given unto <him/her>.