The Valonqar Prophecy
For the first time in his life, Jaime Lannister just turned his back on Cersei. While he fled King’s Landing and rode to the north, this act of independence could set up the fulfillment of the Valonqar Prophecy.
Like the others before it, this prophecy also differs between the books and the show. In A Song of Ice and Fire, young Cersei visits Maggy the Frog in the woods outside King’s Landing. Upon giving the soothsayer a drop of her blood, Cersei learns her fate: rather than marry the prince whom she adored (Rhaegar), she would wed the king (Robert Baratheon). While Maggy revealed that she would indeed become Queen, she promised that another “more beautiful” ruler would end her reign. As for her three children with Jaime:
“Gold shall be their crowns and gold their shrouds,” she said. “And when your tears have drowned you, the valonqar shall wrap his hands about your pale white throat and choke the life from you.”
In High Valyrian, “valonqar” means “little brother.” While many have assumed that Cersei’s physically smallest brother, Tyrion, would have the honor of killing her, others believe Jaime will do the deed.
To be sure, Game of Thrones stopped Maggy the Frog short of including the valonqar prophecy. In the show, she only warned Cersei that she would marry a King, rule for a time, get deposed by a younger and more attractive leader, and have three children that would fail to see adulthood.
While the “valonqar” wasn’t explicitly mentioned on the show, the relationship between Cersei and her two younger brothers is as tenuous as ever. Jaime is clearly disgusted with her leadership, and Tyrion fears she’s growing ever more insane. Meanwhile, Cersei is stuck at King’s Landing counting down the days until the Army of the Dead reaches her home.
Though the valonqar prophecy has only been hinted at in the series, it seems inevitable than one of Cersei’s siblings will initiate the end of her reign on the Iron Throne.