Ragorlang Arc

The Ragorlang is one of the story arcs of the series.
== Synopsis ==
When Hay Lin stayed over at the Lyndons' home, she met Karl and Tecla Ibsen, an elderly couple who appeared to have a connection with Eric's new school. 
Karl told Hay Lin about the Ragorlang, a monster that absorbs the thoughts, the voices, and the sounds of its victims. 
Coincidentally, a few students at Eric's school were becoming inactive as if they had lost their youthful strength.
The same evening, Hay Lin was attacked by a Ragorlang and was saved just in time by the other Guardians. 
Soon they discovered who's behind the new threat: Tecla Ibsen. 
She wanted to be young and beautiful again and used her magical ability to conjure up and control the Ragorlangs, ordering them to steal the youthful strength of the teenagers by absorbing their thoughts and voices. 
The Guardians managed to defeat her and her Ragorlang.
Unfortunately, Tecla returned, but as a frail, older woman, who couldn't summon a fully grown Ragorlang. 
Tecla brainwashed a magical girl, Erin Peyton, and made her believe that the Guardians were the Ragorlangs and that it was their fault that her brother, Kader, went missing. 
At first, Erin used her magic to make the girls hate each other while posing as an exchange student. She held Irma hostage with her mind-controlling power but released her when the Guardians helped her find her brother.
An optometrist, Edward Folkner, stationed himself in Sheffield Institute to monitor the students' health. 
The Guardians found out that he's a Ragorlang hunter who wanted to hunt down Tecla Isben. 
She later regained full power due to power leaked from Kandrakar and attacked the Guardians with a new pack of Ragorlangs. 
Despite being able to use the Shadow of the Heart against the Guardians, she was defeated when the last of her Ragorlangs was absorbed into a box created by Folkner.
Obsessed with the dark power, Folkner utilized the powers for himself and became the supreme Ragorlang himself. 
He was later and was sucked into his own Ragorlang box by the Guardians, and Karl and Tecla were both allowed to start aa new life on Kandrakar after admitting their mistakes.