Dean is transfixed by Sam's eyes and their wrongness, until he hears a loud splat from outside and turns toward the door. When he turns back, Sam is gone.
"Bobby?" Dean gets out, and then runs to the door where Bobby is standing, dazed and bloodspattered. "What happened?"
Bobby wipes the blood from his cheek and takes his hat off. "I was trying to work up the nerve to shoot Roy. Putting a bullet through someone's head...ain't easy." Satisfied that his hat was spared most of the damage, Bobby puts it back on, "Then he just...exploded."
"What? How?" Dean asks.
"Did we get 'em all? Where's Sam?" Bobby wonders, looking around his home warily. Then he stops, scrunches his nose up and says, "Is that...fire.? Aw hell-" Bobby runs to the door leading to his basement where smoke is starting to pour out.
Dean grabs a bucket from under Bobby's kitchen sink, fills it and runs after him. He follows him down to the panic room and throws the water onto the fiery blaze. They both spend the next ten minutes coughing, running up the stairs and back down with more water. When they've drowned the flames, Dean sees the charred remains of bodies - the floor is covered by them. Dean turns to Bobby in horror, and can't think of a thing to say.
Many bottles of whiskey later, Dean manages to speak again. "I need to find Sam."
Bobby grunts in acknowledgement, and then clears his throat before continuing, "...and how are you gonna do that?"
"If he - " Dean picks up his half-empty glass and stares into it, "If Sam drank all those demons, then...I'm guessing he's on some kind of bender? I don't know, I mean even at his worst, his eyes never -"
"Never what?" Bobby asks, hesitantly.
"They've never been yellow before, Bobby. Before tonight, I only ever saw that in my nightmares..." Dean takes a long drink, "and in Hell."
"Well, what do you suppose that means? You think he's changed for good?"
"I don't know, I friggin' hope not. We've pulled each other back from the brink so many damn times, I can't just give up now!" Dean slams his glass down in frustration.
"Ok...so...where do we look?"
Dean walks over and grabs his laptop. "We look for omens."
Meg walks towards the building slowly. It's an almost-finished office building. Nearly done, but unoccupied. The windows are still missing on most of the floors. The air smells like ozone, and when lightning strikes again, only a few feet away from where she is, Meg can see a glass section of the complex illuminated. It's off to the right of the building, and as she gets closer, she sees that it's an indoor pool. "Swanky" she smirks, and makes her way to the glass door.
It's not until her feet have reached the edge of the pool that Meg starts to think coming here was a terrible idea.
"Well, according to the weather map there's a huge storm system north of us. No rain, but tons of lightning and 50 mile per hour winds." Dean slams his laptop shut.
"You think that's where he is?" Bobby asks.
"I think it's our only shot."
The indoor pool hasn't been filled with water yet, and the large room itself is empty. No furnishings at all, just the pool, and a mirrored ceiling.
When Meg looks up at the mirror she thinks -just for a second- that she's slipped back into the Pit.
There are bodies on top of bodies staring back at her - most of their faces frozen in expressions of pain or terror. A sea of black eyes and bloody limbs. Meg blinks and looks over the edge, into the pool.
"Oh, fuck..." she whispers as she's overcome with a sense of dread. She didn't come here because she was curious. She doesn't know why she came here. She didn't want to come here, but she did anyway, because she was summoned. Just like all these other poor bastards.
From the center of the pool, there's a laugh that brings Meg to her knees, instantly. The sound of it tears through her flesh like hooks and pulls at her insides. She cries out in pain and steadies herself with her hands.
"Meg."
The voice is everywhere, and it hurts - it hurts so badly she can't think.
Meg feels a sense of vertigo as she's flung up and up until she hits the mirrored ceiling. Her eyes open against her will and she's staring down into the face of Sam Winchester. He's lying in the center of the pool, on top of the pile of corpses. His eyes are closed, and he's smiling.
"S-Sam?" she says in confusion.
Sam opens his eyes and Meg gasps. Sam's eyes aren't white like Lilith's or yellow like Azazel's. They're some combination of the two. When he moves, even slightly, it looks like his eyes leave behind two trails of fire, like an after-image. Whether it's what she's really seeing, or whether she's just seeing things, it doesn't really matter...what matters is that he's looking at her. "Sam...what - what do you want?"
"Want." Sam says and the word slices a gash through Meg's torso and her blood spills. Sam lets her blood fall on his tongue and smiles.
"Do you want more demons, Sam? I-I can bring you more. Just let me go, and I-"
Sam laughs again and Meg's throat splits open, a fine red trickle running straight down.
"They're drawn to me. You are all drawn to me. You're moths, and I'm a damn bonfire."
With the last word, the room lights up in a brilliant flash as flames rise up all around Sam. The fire surrounds him, laps at him like water, but he remains untouched.
"Sam," Meg gets out, her meatsuit's vocal chords are still working, "Hell is yours! You defeated Lucifer, all you have to do is ask."
"Lucifer. Do you know why Lucifer made you, Meg?"
Meg's ears have started bleeding, but this - she wants to know, "Me? Lucifer talked to you about me?"
Sam's laugh splinters the mirror.
Meg's borrowed body is starting to fall apart. The flames have begun to lick at her toes.
Sam seems to want her to hear this story though, so he stops using words and continues in thoughts.
Demons are all the same to him. He made them as an affront to God, and he made them so I could exist. So I could be his perfect vessel. Part of Lucifer's punishment was that he could never take a human vessel. His corruption would corrupt them. Lucifer made you, so you could make me suitable for him. So I could contain him, forever. And I can. But where's the fun in that?
"So the blood...you don't need it, do you?"
Not anymore. Not for a while now. Lucifer taught me so much during our time together, but I'd forgotten...
"Then why did you kill all these demons, all these host bodies?"
I was thirsty. And I didn't kill them. They're all still here, I just locked them in.
Meg can't see anymore, but she doesn't have to.
"Time to go home."
Sam reaches his hand up and pulls it back towards himself in a fist. The burning earth below him crumbles away and they all fall down and down and down.