A/N: As a quick note, This will be based more in the FMA verse than the DGM verse. Only meaning it'll be based more in Amestres, with mentions of the DGM world.
The Elric brothers held fighting stances against the opposing alchemist, ready to attack if they tried to activate the large array drawn into the dry soil.
The brothers had been sent to the west by Mustang to check out reports of people going missing in a small town. A number of citizens had said that they had seen bright lights emitting form an old church, causing the military to believe someone was using the missing townsfolk in alchemic experiments. When they had arrived the town was silent, except for one of the towns folk laughing as they drew a circle in the town's main square.
They scowled as they saw the the shorter boys pocket watch, flicking their long black braid over their shoulder, and not backing off at the sense of a fight.
"The military has no reason to interfere! I've been planning this for years, and no puny state alchemist is going to ruin it now!"
"WHO ARE YOU CALLING SO SMALL A SPEACK OF DUST COULD RIVAL MY HEIGHT?" The elder sibling stomped his foot and fumed as Alphonse held him back.
"Brother, this guy is serious! Who knows what that transmutation circle might do; this is no time to get angry!"
This time is was the opposing alchemists turn to yell. "WHO THE HELL ARE YOU CALLING A 'GUY'? I'M A FREAKING GIRL."
Without a second thought she slammed down her hands on the edge of the array, causing alchemic sparks to leap up and lick at the sky. The amount of power flowing from the circle darkened everything in comparison, and seemed to literally tear open the sky. Edward wrenched his arm away from his brother's grip, sprinting for the girl as the array began to glow blood red. He grabbed the alchemist by the front of her shirt, causing a manic grin to reach across their face.
"What are you trying to achieve here? What are you doing?" Ed spat at her as she began to laugh.
"A meeting of sorts you could say," She giggled, "But I just need one more thing to open the door."
She brought her head up suddenly, letting it collide with Ed's chin and forcing him to stumble back into the transmutation circle. His grip on her shirt didn't cease, and they both fell back into the 'door'.
Al could do nothing but watch as his brother and the girl disappeared from sight.
"BROTHER!"
...
'E.w...ard!'
...
'A...n!'
...
'..l..ic!'
...
'...ker!'
...
'S..r...Exorcist!'
...
"Brother!"
"What?"
Edward slowly blinked his eyes, making out the silhouette of his armoured brother. His head throbbed as he tried to remember what had happened, and he bolted upright as it came back in a flash.
"Wait what happened? Where is she? Where's that stupid bitch? I'll introduce her to my fist when I-"
Ed stopped shouting when he noticed his brother looking away.
"Al? What's wrong? How long was I out for?"
The younger boy looked towards the alchemic array behind them. "...When the two of you fell into the array, I couldn't see anything. The whole sky light up and when it finally died down you were just laying there next to...I...I thought you were dead."
Edward gave a cautious glance at his brother, before standing up on slightly shaking legs. The world spun and he squinted past the afternoon sun, rubbing at his left eye. He pulled his hand away revealing a mixture of sweat and blood, surprising him that he seemed otherwise fine. His brother stood along with him and they both turned around.
The complex array was now split in half, at its centre a drying patch of blood in the shape of a human form. There was no doubting it was the alchemist girl from before, with strands of her black hair clinging to the edges of the puddle. What was more interesting than the morbid scene before them though, was the water-like wall dividing the array and remains, its surface reflecting something more than just the space around. The two Elric brothers were in awe as they slowly approached the wall.
"What...is it? Is this what they were trying to make?"
"I'm not sure brother, but look; it's only a few inches thick. You can walk right around it."
Alphonse moved to the edge of the wall, demonstration that he could simply move behind it, but Ed wasn't paying him any attention. Gazing into it, the youngest state alchemist could see not the farm houses and church from before, but instead a small town, with its citizens gazing back equally confused. Al had walked the six meter span of wall, noticing the town from the other side as well, and as he came around the other side he saw his brother reaching out to the wall.
"Brother wait!"
Edward's left had made contact with the reflection, and he blacked out.
...
"My god! What just happened?"
"What...What is that?"
"I don't know. But that girl, she's gone."
"Wait...is that blood?"
"Is everyone okay? Are we all still here?"
"Hey where's A-...?"
...