the Seven and has convinced Tommen to merge the Faith and the Crown. Despite being stripped of her allies, Cersei opts to remain in King's Landing, having named Ser Gregor as her champion in her trial by combat. However, Tommen announces that trial by combat has been abolished and replaced by trial by the Seven. Cersei arranges for a cache of wildfire to be detonated beneath the Sept during Loras' trial, which kills the High Sparrow, Margaery, Loras, and the rest of the Small Council. As a result of Cersei's actions, Tommen commits suicide. In the power vacuum following Tommen's death, Cersei claims the Iron Throne as the first queen regnant of the Seven Kingdoms. Season 7 Despite nominally being ruler of Westeros, Cersei's grip on the throne is tenuous, with the Riverlands in upheaval following Arya Stark's massacre of House Frey, the Vale and the North's declaration of Ned Stark's bastard son Jon Snow King in the North, and Tyrion, Yara Greyjoy, Dorne, and the Reach all supporting Daenerys Targaryen, whose fleet has seized Dragonstone. Cersei remains cold and distant after Tommen's suicide, viewing it as a betrayal of their family. With no children left to protect, Cersei's malice and vindictiveness have grown, and she relentlessly seeks to expand her power and destroy her enemies. Cersei reaches out to the King of the Iron Islands, Euron Greyjoy, to form an alliance, but rejects Euron's marriage proposal as she considers him untrustworthy. Euron later ambushes Daenerys' fleet and captures Yara Greyjoy, Ellaria, and Tyene Sand, and presents them as a "gift" to Cersei. She agrees to marry Euron after the war is won; however, she continues her affair with Jaime, no longer attempting to hide their relationship from their servants. Cersei imprisons Ellaria and Tyene in the dungeons, kills Tyene with the same poison used to kill Myrcella, and keeps Ellaria alive to watch her daughter die and decompose. Tycho Nestoris of the Iron Bank arrives in King's Landing to request repayment of their debt. Cersei requests a fortnight in order to comply. She then has the Lannister and Tarly armies attack Highgarden, defeating the Tyrells. Olenna Tyrell commits suicide following the defeat and gloats to Jaime that she was responsible for poisoning Joffrey. The Tyrells' wealth is transported safely to King's Landing, but the food the Lannisters steal from the Reach is destroyed when Daenerys attacks the caravan with