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From World of Warcraft# 5 Released ! new on the Blizzplanet fansite:

This Idol was given to Broll by Remulos years ago. The idol is carved and shaped like a green dragon allowing Broll a special connection with the Emerald Dream. During the Battle of Mount Hyjal, Azgalor the pitlord attacked Broll with fel energy. This fel energy targeted the Idol of Remulos, held by Broll, and through it filling Broll with fury and rage. The Idol of Remulos exploded with fel energy killing Broll's daugther. Broll has lived with grief and pain and guilt ever since. The spirits of the wild had abandoned Broll: the stag, the panther, the seal and the stormcrow.

Yet only one spirit remained with him ... the spirit of the bear, corrupted by fel magic, feeding Broll's rage. The corrupted Idol of Remulos was thought lost by Broll and the Druids. However, Broll found out at Warsong Gulch that the corrupted Idol was retrieved by the Thistlefur Furbolgs, corrupting them. For this matter, Broll and Lo'gosh (the amnesic human) fly with help of Hippogryph Sharptalon toward Thistlefur Hold in Ashenvale to cleanse the corrupted idol of its fel energies.