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This article contains plot details from the latest books.
Mesmers are elves with the special ability to put people in trances and control them. They are very rare and monitored by the Council because they can be dangerous.
Mesmers are able to force people to do anything that they command. Their victim(s) are fully conscious during the mesmerizing process, just unable to stop it. People with strong wills are shown to be able to resist the mesmerizing process. In addition, it's harder to mesmerize large groups of people.
Grady doesn't like to talk about his abilities because it caused his friends to stop trusting him in his school years. He was even teased by Edaline's parents about mesmerizing their daughter into marriage. His limit of amount of people he can mesmerize at once is said to be around 24. Grady also hates being enhanced because he gets out of control. When Grady is enhanced, he is able to control not only human minds, but animal minds as well.
Examples of Mesmerizing Edit
Grady mesmerized the Councillors into slapping themselves in the face and forced Brant to hold his hand in a ball of Everblaze, burning his hand. He also made Edaline wave her hands around like a "flailing octopus". Also in Everblaze, Grady made King Dimitar punch himself in the nose when he was threatening to take Sophie to Ravagog. In Nightfall, Grady makes Fintan unlock the door to the exit and then makes Fintan knock himself out. That ends up in Vespera smashing Biana into the mirrors.