Heir of Fire (Throne of Glass, #3)

by Sarah J. Maas

So I am staying. Because you are needed, and because I will follow you to whatever end.”

“I claim you, too, Aelin Galathynius.”

“A blood oath is eternal,” Maeve said tightly. Celaena didn’t think his friends were breathing. “I don’t care. Free him.” Celaena held out the ring again. “Your choice. Free him, or I melt this right here.”