Fics like The Stark Singularity

Tony Stark loved James and Lily. For one brilliant summer, they were his. And then they vanished—no explanation, no warning. He thought they left him behind. He thought he ruined it. Years later, two brilliant, secretive teens crash into his life with sharp eyes, fake names, and a medical mystery Tony can’t ignore. What he does know? They’re his. Born of magic and shaped by pain, Harry and Dorea have survived the worst of both worlds—wand and weapon. They’ve learned to hide in plain sight. But with Avalon stirring and old powers reawakening, hiding isn’t enough anymore. The Wizarding World doesn’t know the Infinity Stones are real. SHIELD doesn’t know Avalon ever existed. And Tony Stark is about to discover that the most important thing he ever built… wasn’t a suit.

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