The 8th Deadly Sin

There are only 7 Deadly Sins, right? Wrong. There was an 8th that the others cared not to remember.

We all know Lust, Gluttony, Greed, Sloth, Wrath, Envy, and Pride, right? Well what if their Father created an 8th Sin? A homunculus that he just used to dump every part of him that would disgrace the "perfect being" he was trying to achieve. With everything "Father" had dumped into this homunculus, it earned the name Deject the Desolate.

Many centuries after Deject's creation, after saving an orphan from a fire, he was beaten by "Father" and the other Sins enough to reveal his true form as an infant human child. This child was then sent off to Hohenheim after he had married Trisha and they were expecting their first child.

Unfortunately Trisha had a miscarriage. Hohenheim, not wanting Trisha to know about the unfortunate death of their firstborn, somehow convince the doctors to "replace" their dead child with the baby Deject, now making him Edward Elric.

About a year later, Trisha and Hohenheim had given Edward a baby brother named Alphonse and they both grew up as if they were legitimate blood brothers, as Edward would only be able to remember his life originating as a homunculus after the brothers attempt human transmutation to get Trisha back from the dead.

Ed looses his right arm and left leg, Alphonse looses his entire body having his soul bonded to a suit of armor thanks to Ed, and Ed figures out that he's on his last life making him closer to a human than any of the other homunculi.

(I also moved the timeline slightly so it would be set in a more modern time because I can. Obviously, I do not own Fullmetal Alchemist, all rights go to the writer, and I'm pretty sure this kind of "if Ed was a homunculus" headcanon was probably done before but this is my version. This is also a fmab re-wright with pieces of the original fma. Like, a whole few episodes...)

Thoughts are in italics, authors notes are bold and in (), P.O.V. changes are bold and underlined.