Rise of the Seventh Moon by Rich Wulf is an Eberron novel published in 2007. It is the third book of the Heirs of Ash trilogy.
“
Ashrem's Legacy
... a powerful relic of the
Last War
lost for ages. Now it is found. But will it bring about the world's salvation or its destruction? As the heirs of
Ashrem
struggle to gain control of the Legacy, the ultimate end to their quest may be taken from them, as the great dragons of far
Argonnessen
enter the struggle. On a far distant shore, the fate of the world will be decided.
”