Fire & Blood Vol. 1 | The Dying of the Dragons - A Son for a Son (Chapter 14)

Daemon went to Harrenhal on his dragon and captured the castle, along with a serving wench named Alys Rivers who some said had magical powers. Jacaerys went to the Vale and convinced Lady Jeyne Arryn to join by promising her protection by dragonriders. Then he flew to White Harbor and convinced Desmond Manderly by offering his younger brother to wed Desmond’s daughter. Then he flew to Winterfell and became friends with Cregan Stark. They betrothed their future children together, and then signed a pact. Meanwhile, Lucerys rode to Storm’s End to ask Borros Baratheon to join him, but Aemond Targaryen was there, promising to wed one of Borros’ daughters. Borros denied Lucerys and Lucerys left. Aemond, who had lost his eye to Lucerys, followed him on his dragon, then killed Lucerys and his dragon Arrax.