Fics like The Longest Night

When Dudley's magic threatens his life, Harry strikes a Faustian bargain with a cult to save him. Dudley is spared, but the cost is Harry's soul. Slight xover with Dresden Files and White Wolf/Vampire: The Masquerade. You only need to know HP lore to enjoy this! ENDGAME PAIRING UNDECIDED, NO MULTI, POLY, OR HAREM

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