Fics like The Ratking

Regulus Black has wanted to kill his father since the day he’d hurt Sirius. Two years later, Regulus decides to bring his wish to fruition along with his friends. Quickly, their little murder plot spirals into a web of lies, intrigues, treason and backstabbing. How far is Regulus ready to go to get what he wants? How far is too far for those he holds dear? or The Slytherins decide to kill their respective fathers

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