The death of Lucerys marks the end of diplomacy. The look on Rhaenyra’s face in the final shot signals that the "Dance of the Dragons" (the Targaryen civil war) has officially begun.
📍 : Dragonstone and Storm's End.
: Princes Jacaerys and Lucerys are sent as messengers to secure the support of Great Houses (Arryn, Stark, and Baratheon). The death of Lucerys marks the end of diplomacy