The Legion of Flame (The Draconis Memoria)

Survival is the only currency...
 
For centuries, the vast Ironship Trading Syndicate relied on drake blood-and the extraordinary powers it confers to those known as the Blood-blessed-to fuel and protect its empire. But when the drake blood lines began to fail, a perilous expedition was mounted to secure them.
 
Claydon Torcreek survived the fraught mission through uncharted lands in pursuit of a myth that might have secured his people's future. Instead he found a nightmare. The legendary White Drake was awoken from a millennia-long slumber, with a thirst to reduce the world of men to ashes, and the power to compel an army of Spoiled slaves to do it.
 
Spurred on by a vision he desperately hopes he can trust, Clay and rebel naval officer Corrick Hilemore hijack a warship and head towards the icy southern seas, searching for an ancient secret that may give them and their allies a fighting chance.

They are aided on another front by Blood-blessed agent Lizanne Lethridge. The spy and assassin will use her diplomatic status to infiltrate deep into enemy territory on a quest for a device to save them all.
 
As the world burns around them, and the fires of revolution are ignited, these few Blood-blessed are the last hope for all of civilisation.