What did cersei do to the Mountain?

Following the destruction of the Great Sept of Baelor that kills the Tyrells and the High Sparrow, Cersei tortures Unella by waterboarding her with wine in a cell and leaving her to be, presumably, tortured slowly to death by Ser Gregor Clegane, also known as the Mountain.

What did kyber do to the Mountain?

During the battle, he manages to cut the Mountain with his spear, which he had poisoned with manticore venom in hopes of getting his revenge on the man who had raped and killed his sister and her children years ago. The Mountain is slowly and painfully dying, and Qyburn has to work hard to save his life.

What is Qyburn doing in the black cells?

Cersei has Qyburn torture the Blue Bard in the black cells, to convince him to give evidence against Queen Margaery Tyrell. The torture so breaks his mind that even after the Blue Bard is taken by the Faith Militant and tortured by them, he persists in the story that Cersei and Qyburn had taught him.

What was done to the Mountain in got?

It is later revealed that The Mountain has been poisoned with manticore venom, a poison with which Oberyn had laced his weapon, and that he is slowly dying. Cersei enlists ex-maester Qyburn to save him, though Qyburn claims that the procedure will “change” Clegane.

How did the Mountain turn into a zombie?

Gregor “The Mountain That Rides” Clegane is poisoned by Oberyn “The Red Viper” Martell’s poisoned spear during their trial by combat.

Why did they change the Mountain actor?

Conan Stevens played the Mountain in the first season of Game of Thrones and the producers seemed to be happy with his performance. However, he left the show after the first season due to scheduling overlaps. Aside from his role in Game of Thrones he is known for similar acting roles.

Who is clegane loyal to?

One of the only people he has ever shown any loyalty or respect toward is Tywin; when not actively obeying Tywin’s orders he mostly acts of his own accord, showing even little respect toward King Robert Baratheon after he was told to stop his fit of rage at the Tourney of The Hand.