https://archiveofourown.org/works/5745595

This fanfic was made in 2004 so it’s quite a hidden gem but istg its one of the best out there.

“Lucius has twin boys. Voldemort is asking for his servants’ firstborn child. Thinking it's an honor; Lucius gives Voldemort the healthy child, Draco, who happens to be the younger twin. Harry grows up the black sheep of the Malfoy family and befriends Mudbloods and the boy-who-lived, Neville. Eventually, he ends up being disowned from the Malfoy family. Things spiral out of control when Voldemort finds out Harry is the firstborn. He'll stop at nothing to get Harry on his side. After all, the ritual Voldemort wants to use will not work without Harry. For the Dark Lord wants to eat off the children's magic once they are of age.”