The first sound was a drumbeat.
Slow.
Deep.
Ancient.
Boom.
The chamber trembled.
Caelan looked toward the floor.
Another beat followed.
Boom.
Then thousands of voices rose from beneath the frozen kingdom.
The Northern Guardian turned toward the underground passage.
"The army."
Lucien tightened his grip on his sword.
"What army?"
The Keeper's face had lost all color.
"The army of the Crownless King."
Nethros stared...