Jon, Arya, and Brienne held the southern gate. Grey Worm led the Unsullied in phalanx formations, pushing back waves of wights.
Andrew, from above, called ancient Valyrian words. Flame lines ignited the snow, forming burning sigils that created a ring of protection.
The Night King sent more walkers. They passed the fire untouched.
Andrew landed within the ring. "He remembers Valyria," he told Daenerys. "He was there once. Or something older wore his face."
"Can he be killed?" she asked.
Andrew stared into the dark.
"I'll find out."