The Killing Song by Don Bassingthwaite is an Eberron novel published in 2006 by Wizards of the Coast. It is the third and final book in The Dragon Below trilogy, following The Grieving Tree. It sees the end of the quest for Singe, Natrac, Geth, Ekhaas, Orshok, and Ashi d'Deneith and their confrontation with the copper dragon Dah'mir and the daelkyr known only as the Master of Silence.
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Sealed away for ages, a forgotten horror reaches out for new power.
Three heroes know the danger. In the City of Towers, a tormented mystic and a soldier-wizard try to thwart a monstrous scheme. In the Shadow Marches, a disgraced warrior summons an ancient sect to battle.
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— Back-cover text