While Medivh worked to convince the Orcs and Humans of the need for an alliance, the Night Elves fought the Legion in their own secretive ways. Tyrande Whisperwind, the immortal High Priestess of the night elf Sentinels, battled desperately to keep the demons and Undead from overrunning the forests of Ashenvale. Tyrande realized that she needed help, so she set out to awaken the night elf druids from their thousand-year slumber. Calling upon her ancient love, Malfurion Stormrage, Tyrande succeeded in galvanizing her defenses and driving the Legion back. With Malfurion's help, nature herself rose up to vanquish the Legion and its Scourge allies.

While searching for more of the hibernating druids, Malfurion found the ancient barrow prison in which he had chained his brother, Illidan. Convinced that Illidan would aid them against the Legion, Tyrande set him free. Though Illidan did aid them for a time, he eventually fled to pursue his own interests.

The Night Elves braced themselves and fought the Burning Legion with grim determination. The Legion had never ceased in its desire for the Well of Eternity, long the source of strength for the World Tree and itself the heart of the night elf kingdom. If their planned assault on the Tree was successful, the demons would literally tear the world apart.

The Battle of Mount Hyjal

Under Medivh's guidance, Thrall and Jaina Proudmoore -- the leader of the human forces in Kalimdor -- realized that they had to put aside their differences. Similarly, the Night Elves, led by Malfurion and Tyrande, agreed that they must unite if they hoped to defend the World Tree. Unified in purpose, the races of Azeroth worked together to fortify the World Tree's energies to their utmost. Empowered by the very strength of the world, Malfurion succeeded in unleashing Nordrassil's primal fury, utterly destroying Archimonde and severing the Legion's anchor to the Well of Eternity. The final battle shook the continent of Kalimdor to its roots. Unable to draw power from the Well itself, the Burning Legion crumbled under the combined might of the mortal armies.