This title is no longer available in game.
This title was the reward for completing the warlock-only quest line for green fire. Although the quest line had been added in Patch 5.2.0, this wasn't added until Patch 6.0.2 (to reward those for doing the quest line at level 90).
Despite what some claimed, it was available up until the release of Warlords of Draenor.
I didn't care about green fire but this title I had to have.