In the sixth episode of The Shannara Chronicles' first season, titled " Pykon ," Amberle, Wil, and Eretria seek refuge in an abandoned fortress, where they encounter a dangerous caretaker, Remo, and his daughter, Mag. The group narrowly escapes after a confrontation with the deranged man, culminating in a dramatic cliffhanger where they are forced to use the Elfstones. Meanwhile, the Changeling manipulates Prince Arion, and a separate expedition into gnome territory faces betrayal.
You can find more details about this episode on the Official Shannara Wiki or read reviews on platforms like IMDb . "The Shannara Chronicles" Pykon (TV Episode 2016) - IMDb