" Hybern hunts you because of what you took from the Cauldron. The queens want you dead for vengeance—for robbing them of immortality.”
“I know.” Nesta’s voice was hoarse.
“What did you take.”
“I don’t know.” The words were barely more than a whisper. "

― Sarah J. Maas , A Court of Wings and Ruin (A Court of Thorns and Roses, #3)