The ancient gate stood silent.

Lucien stared at it, his sword still in his hand.

Caelan had disappeared beyond it.

But the strange silver symbol inside Lyra's Crystal Heart continued to glow.

Nethros approached the gate.

"Can you open it?"

Lyra shook her head.

"I don't know."

"Try."

She placed her palm against the stone.

Nothing happened.

Then the Crystal Heart floated from her hands.

The silver symbol moved across its surface and appeared on the gate.

A deep rumble followed.

The ancient doors slowly opened.

Cold air rushed toward them.

Beyond the gate was a city.

Not a ruined city.

Not an abandoned city.

A living one.

Thousands of...