One.

"The world isn't split into good people and Death Eaters. We've all got both light and dark inside us. What matters is the part we choose to act on. That's who we really are."

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Harry returns from the cave with Dumbledore, except this time they come back with somebody the world thought died years ago. Regulus Black is alive and saved, having been trapped in time by elf magic. Harry doesn't know it when they find him, but Regulus will be the exact thing The Golden Trio needs to help them win the war.

Harry Potter AU | Begins at the end of HBP