Fullmetal Alchemist: Testament of the Brothers of Sin

Edward Elric gave up his dreams to defeat Dante. But then he opened the Gate for Alphonse, and returned without him after the Thule Society invaded, to unwittingly provide their true presumed dead half brother with the key to mass produce the Philosopher's Stone to transmute a perfect God. The price for cherishing Al was to condemn both worlds. Crossover with the BUSO RENKIN Manga.