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  === ''A Storm of Swords'' ===
  After formally assuming his position as Hand of the King, Tywin makes it clear to Cersei that she is no longer welcome at Small Council meetings, ''de facto'' stripping her of political authority. Furthermore, Tywin intends to wed Cersei to Wilas Tyrell in order to form an alliance with House Tyrell. This state of affairs is shaken when Joffrey is poisoned at his wedding feast. Maddened with grief at the loss of her eldest child, Cersei lashes out against Tyrion, accusing him of poisoning the king out of revenge.
  Cersei manipulates Tyrion's trial to ensure a guilty verdict, by bribing and intimidating witnesses. When Tyrion demands a trial by combat, Cersei selects the imposing Gregor Clegane, "The Mountain," as the Crown's champion. The Mountain prevails, killing Tyrion's champion Oberyn Martell. Tywin then pronounces Tyrion guilty and sentences him to death, but Tyrion escapes prison and kills Tywin. Cersei is once again in complete control of the capital.