Fade Fuel is an elixir that helps bring people back after partially fading away. Elwin had Kesler make a special limbium-free fade fuel for Sophie because of her allergy. Sophie is given a necklace with fade fuel to wear around her neck due to the incident of her almost fading in Book 1: Keeper of the Lost Cities and frequent almost fading in Book 2: Exile before she was fixed by Mr. Forkle.

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