Cersei Lannister's Downfall Power's Price

Cersei Lannister's pursuit of power leads to the decline of House Lannister through several destructive actions: orchestrating the destruction of the Great Sept of Baelor, which alienates allies and leads to her son Tommen's suicide; alienating powerful houses like Tyrell and Martell, resulting in isolation; reckless financial management that depletes the Lannister treasury; underestimating threats like Daenerys Targaryen and the Night King, leading to military losses; and losing her intelligent brother Tyrion to Daenerys. These actions collectively erode the Lannisters' political and military power, culminating in their downfall.