Summary: One ShotCrossover with FMA What if there had been an even bigger twist to the first confrontation of Vader and Luke?

Disclaimer: I won neither FMA nor Star Wars.

A/N: This was written on a whim at 12 o'clock at night, so if this doesn't make any sense you know why.

Warning: Spoilers for the end of FMA.

Beast's Gate

There he was, perched precariously above the seemingly unending chasm of metal that stretched out below him. He had stuffed the stump where his hand used to be into his clothing in what appeared to be an attempt to stop the pain.

Vader stepped forward; the time had finally come to reveal the truth.

"Luke, I am your father."

The face of the boy before him twisted, as though he was about to scream, but that was not the sound that sprung fourth from his mouth.

"Ha…ha-ha-ha…"

His visage had warped into a cruelly amused sneer, a perverse mockery of a smile. And it was widening slowly into a positively manic grin.

"Yes…my father. Just like I thought." Vader was, by this point, fearfully perplexed- this was not the reaction that he had anticipated.

The boy stood up, his injured arm forgotten. "You know," He said, his words laced with a tone of contemptuous amusement, "I was so very upset when I had found out where that damned gate had taken me, that I killed my counterpart in this world the moment I saw him! Taking over his life was easy from there. So very, very easy. Humans in war times can be quite unobservant, and it didn't take me long to find out enough about the boy to become him."

Vader was completely speechless, what in the name of the force was Luke talking about?

"What, does daddy not understand? That's okay, I'll explain." He took a step forward. "You see, I told the gate to take me to where my father was, but it took me to my father's counterpart instead. Now, I figured it would help to alleviate some of my boredom if I could at least kill him while I find a way to get the gate to work again. The only problem was that I didn't know where my father here was. But I just found out! Lucky, huh?

"Can you imagine my surprise when I found out that in this world my old self's twin sister, who died in childbirth, was still alive. Even better- Dante was dead! I had good laugh after finding out that one. Anyway, I digress; I took over the boy's life, and found out that I could use the same funky powers he could! And all of that lead back to you, father."

"You said before that you wished to kill me because I killed your father, I sensed no untruthfulness from you."

"That 'force' thing is less reliable than you give it credit for- trust me. If you must know, I'm going to kill you because you're the one who made me like this."

Vader's synthesized voice was suffused with uncertainty. "Made you like what?"

Instead of answering, Luke's face twisted into a feral snarl, and he lunged forward. The boy was exuding more hatred than Vader had been able to muster in his entire lifetime, and out of sheer reflex the Dark Lord's lightsabre found itself imbedded in Luke's chest.

There was an eerie flash of light, and suddenly the boy before him looked completely different. From what Vader could see of the slumped figure, he had long black hair, and had the palest skin he had ever seen on a human.

This imposter was dead. He could sense it in the force.

Except when the boy's head snapped up.

"You killed me. That's not very nice."

His presence was back, and it felt the same as Luke's, yet this boy was not his son.

"Luke…"

The manic grin was back.

"Call me Envy, father."

A/N: Yeah…I hope that made at least some semblance of coherent sense- I doubt it though.