When Need is Greatest

Merlin is all that's left of Avalon. After watching loved ones die, and kingdoms fall, none of it equated to the pain he felt when Arthur died.
But maybe Arthur won't be gone forever. After all: When Albion's need is greatest, King Arthur will rise again... if not in the way Merlin expected.

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I'm incapable of writing anything that isn't angst so TW for mental health issues, including thoughts and conversations about depression, self harm, suicide. Reader discretion is advised if these topics are triggering to you.