Leech ritual—None explicitly stated—Deaths of the 'usurpers'—None (ritual had no effect)—Twist of fate leading to death by other means
Occurred in
Game of Thrones Season 3, The Rains of Castamere
Appearances
A Clash of Kings (book, 1998)Game of Thrones Season 6A Storm of Swords (book, 2000)Second SonsGame of Thrones Season 3A Clash of KingsGame of Thrones Season 2A Storm of Swords