Jon Arryn
Jon Arryn, Lord of the Eyrie, Defender of the Vale, and Warden of the East, served as Hand of the King for fourteen years under Robert Baratheon. He was the man who raised the banners of revolt rather than surrender his wards, Eddard Stark and Robert Baratheon, to the Mad King Aerys II Targaryen. His death, initially attributed to a sudden illness, proved to be the catalyst for the unraveling of the Seven Kingdoms, as it set Eddard Stark on a path of investigation that uncovered the Lannisters' greatest secret and led directly to war.
Identity and Role
Jon Arryn was a man of immense political weight and personal integrity. He was the Lord of the Eyrie, a position that made him one of the most powerful lords in the realm. As Hand of the King, he was the second most powerful man in the Seven Kingdoms, speaking with the king's voice and commanding the king's armies. He was also a second father to both Eddard Stark and Robert Baratheon, having fostered them in his youth at the Eyrie. This bond was so strong that when Aerys II demanded their heads, Arryn raised his moon-and-falcon banners in revolt rather than give them up. He later stood with Ned in the sept at Riverrun to wed the two sisters, Catelyn and Lysa Tully, binding the houses of Stark, Tully, and Arryn together. Robert himself declared, "I loved that old man," a sentiment Ned Stark echoed, saying, "We both did."
Death and Its Circumstances
Jon Arryn's death was sudden and suspicious. He fell ill after a tourney on Prince Joffrey's name day, a fortnight before he died. Grand Maester Pycelle reported that Arryn had seemed troubled and asked for a book on the lineages of the great houses the day before he fell ill. The illness was described as "a fire in his gut" that "burned right through him." Pycelle dismissed the young Maester Colemon, who had been treating Arryn with purges, fearing he might kill the Hand. In his final hours, Arryn called out the name "Robert" several times and whispered, "The seed is strong," a cryptic phrase that later proved to be the key to the mystery of the royal succession. Catelyn Stark received a secret letter from her sister Lysa, written in a private code from their girlhood, warning that the Lannisters had murdered Jon Arryn. The letter was hidden in a carved wooden box containing a Myrish lens, delivered to Maester Luwin. Lysa's accusation was specific: "The Lannisters," she wrote, and "the queen."
The Investigation and Its Consequences
Eddard Stark's investigation into Jon Arryn's death led him to the truth that destroyed the Baratheon dynasty. Following Arryn's trail, Ned discovered that the Hand had been studying the lineages of the great houses, specifically the Baratheon and Lannister lines. He learned that Arryn had visited the master armorer Tobho Mott with Lord Stannis Baratheon to see a boy named Gendry, a king's bastard with the unmistakable Baratheon look of black hair and blue eyes. Ned realized that Arryn had discovered that Robert's trueborn children—Joffrey, Myrcella, and Tommen—were not his, but the products of incest between Queen Cersei and her twin brother, Ser Jaime Lannister. The phrase "the seed is strong" referred to the Baratheon blood, which always produced black-haired children, a truth that made the golden-haired Lannister children a damning anomaly. Varys later confirmed to Ned that Arryn had been poisoned with the Tears of Lys, a rare and untraceable poison, by "some dear sweet friend who often shared meat and mead with him." The eunuch also revealed that Arryn had been warned to use a taster but refused, saying only one who was "less than a man" would think of such a thing.
Legacy and Significance
Jon Arryn's murder was the first act of the Lannister conspiracy to secure the Iron Throne. His death removed the one man who might have curbed Robert's wildness and exposed the truth before it was too late. It also left the realm without a steady hand, as Robert was surrounded by flatterers and fools. Ned Stark, who took Arryn's place as Hand, was doomed from the start, as he lacked Arryn's political experience and was walking into a nest of adders. Arryn's death also drove his widow, Lysa, to flee to the Eyrie with their sickly son, Robert Arryn, whom she protected obsessively, refusing to let him be fostered elsewhere. The investigation into his death set in motion the chain of events that led to Ned's arrest, the war between the Starks and Lannisters, and the eventual crowning of Robb Stark as King in the North. Jon Arryn, the man who had held the realm together for fourteen years, was the first casualty of the game of thrones, and his absence was felt in every subsequent tragedy.

