Nishat

“Cassian’s waiting for you, Nesta,” Azriel said—tone gentling. “Take off the Mask.” Nesta stayed silent, Ataraxia ready in her hand. One swipe, and Azriel would be dead. “He’s waiting for you at the House of Wind,” Azriel went on. “At home.” Another blink from Nesta. The silver fire banked a little. Like whoever Cassian was, and whatever the House of Wind was … they might be the only things capable of fighting the siren song of the Mask.”
― Sarah J. Maas, House of Flame and Shadow