Lego Nexo Knights Season 2 Episode 9 - The Fortrex and the Furious Episode Title:The Fortrex and the Furious.Episode Description:Recapping from the previous episode, the figure who Jestro gave the Book of Betrayal to is revealed to be Clay, who takes Jestro to the Fortrex. When the Book of Monsters attempts to gain the Book of Betrayal and Jestro, the Nexo Knights split up as a diversion until Clay is cornered. Now fully reformed, Jestro sacrifices himself so Clay can escape with the Book of Betrayal. The Nexo Knights then stage a rescue mission to save Jestro from the volcano lair where the Book of Monsters reveals his true plans. He was once the dark necromancer Monstrux until Merlok divided his powers and evil among twelve spellbooks with his physical form being turned into one of them. The Book of Monsters used Jestro in order to return to his normal form and chains him in his "Dark Arena" waiting for the Book of Betrayal to corrupt the Nexo Knights. Unfortunately, Clay has already succumbed to its power and begins to bring the Book of Betrayal to to The Book of Monsters.