Speak with Torastrasza at Wyrmrest Temple in Dragonblight.
Atop the Wicked Coil, the Grand Necrolord of the Scourge, Antiok, sits upon the shoulders of the reconstructed storm giant lord, Thiassi. From there he commands the armies of undead to work day and night to unearth Galakrond's massive bones. Should they succeed in raising Galakrond, all of your efforts will have been for naught.
While I cannot call down the full fury of the Red Dragonflight to assist you in your journey, I will grant you my blessing. Go now and speak with my majordomo, Torastrasza.