Nightmare Grove

The Nightmare Grove is reached through the portals of four Emerald Dream groves: the Twilight Grove in Duskwood, Seradane in the Hinterlands, Dream Bough in Feralas and Bough Shadow in Ashenvale. The grove a traveler enters decides which dragon waits first, and after each dragon falls, a portal leads on to the next.

Emeriss, Lethon, Taerar and Ysondre were once Ysera's most trusted lieutenants among the green dragons. A dark new power within the Emerald Dream warped them, and they came through the Great Trees into Azeroth to spread madness and terror across the mortal kingdoms.

The Nightmare changed each of them. Emeriss has rotted into a diseased monster, and putrid mushrooms burst from the corpses of those she kills. Lethon's scales have darkened, and he draws shades out of his enemies that heal him when they reach him. Taerar's sanity and his body were shattered; he is now a specter that can split into several beings. Ysondre's healing powers have given way to dark magic: she casts lightning and calls fiendish druids to her aid.

The dragons carry objects engulfed in nightmare. When Keeper Remulos cleanses one in the waters of Lake Elune'ara in Moonglade, a vision of Malfurion Stormrage appears. Malfurion warns that Ysera's brood has fallen to old whispers and that the Nightmare seems to have broken through to find a new host on Azeroth.