After you kill one of the four corrupted Green dragons, you loot an object shrouded in nightmare named Malfurion’s Signet Ring. A quest starts to go to the Moonglades. You bring your finding to Remulos—son of Cenarius—at the Moonglades and suddenly, Malfurion’s dream form appears before Remulos.
Keeper Remulos: “Malfurion!”
Malfurion: “Remulos, old friend. It is good to see you once more. I knew that the message would find its way to you – one way or another.”
Keeper Remulos: “It was shrouded in nightmares, Malfurion. What is happening in the Dream? What could cause such atrocities?”
Malfurion: “I fear for the worst, old friend. WIthin th Dream we fight a new foe, a born of an ancient evil. Ysera’s noble brood has fallen victim to the old whisperings. It seems as if the Nightmare has broken through the realm and seeks a new host on Azeroth.”
Keeper Remulos: “I sensed as much, Malfurion. Dark days loom ahead.”
Malfurion: “Aye, Remulos. Prepare the mortal races.”
Keeper Remulos: “You have been gone too long, Malfurion. Peace between the children of Azeroth is tenuous at best. What of my father? Of your brother? Have you any news?”
Malfurion: “Cenarius fights at my side. Illidan sits atop his throne in the Outland – brooding. I am afraid that the loss to Arthas proved to be his breaking point. Madness has embraced him, Remulos. He replays the events in his mind a thousand times per day, but in his mind, he is the victor and Arthas is utterly defeated. He is too far gone, old friend. I fear that the time may soon come that our bond is tested and it will not be as it was at the Well in Zin-Azshari.”
Keeper Remulos: “Remulos, I am being drawn back … Tyrande … send her my love … Tell her I am safe. Tell her … Tell her I will return … Farewell …”
Keeper Remulos: “Farewell, old friend … Farewell … Let us return to the grove, mortal.”
Quest: Eranikus, Tyrant of the Dream
Travel to the continent of Teldrassil and find Malfurion’s agent somewhere outside the walls of Darnassus.
Malfurion: “This is a journey of redemption, hero. Would it be that I was slain today, I would have died for a just and righteous cause. You must recover the green scepter shard. You must cleanse Eranikus of the taint placed upon him by the Old Gods.
Travel to Darnassus. Just outside the city walls you will find one of my agents. This agent will set things in motion for us and inform Tyrande of our plans without alerting Staghelm.
A fall from grace a thousand years in the making…”