Knaak, Richard A. WarCraft. War of the ancients trilogy #02

The night elf defenders, led by the young druid, Malfurion Stormrage, and the wizard, Krasus, fight a desperate battle to hold back the Legion's terrible onslaught. Though only embers of hope remain, an ancient power has risen to aid the world in its darkest hour. The dragons - led by the powerful Aspect, Neltharion - have forged a weapon of incalculable power: The Dragon Soul, an artifact capable of driving the Legion from the world forever. But its use may cost far more than any could have foreseen

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