Lucerys Velaryon of the Vampire Coast
The tragedy that befell Lucerys Velaryon at Storm’s End was never planned, on this all of our sources agree. The first battles in the Dance of the Dragons were fought with quills and ravens, with threats and promises, decrees and blandishments. The murder of Lord Beesbury at the green council was not yet widely known; most believed his lordship to be languishing in some dungeon. Whilst sundry familiar faces were no longer seen about court, no heads had appeared above the castle gates, and many still hoped that that the question of succession might be resolved peaceably.
The Stranger had other plans. For surely it was his dread hand behind the ill chance that brought the two princelings together at Storm’s End, when the dragon Arrax raced before a gathering storm to deliver Lucerys Velaryon to the safety of the castle yard, only to find Aemond Targaryen there before him.
And with Lucerys's death, the war of ravens and envoys and marriage pacts came to an end, and the war of fire and blood began in earnest.
Or, Lucerys is killed over Shipbreaker Bay as he was always fated to be. Only this time he doesn't stay dead.
Mostly.