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Cas makes his way into the kitchen after Dean hears him apologise and make an excuse to leave the table. His gaze flicks to Dean’s shoulder as he walks into the room, in a familiar gesture that’s so quick Dean’s sure he’s seen him do that before and just dismissed it.

“Dean?” Cas says with concern, eyebrows scrunching together endearingly. “Are you okay?”

“Yeah, but you mind telling me what’s up with this?” Dean gestures at where the handprint should be – which to him still looks like normal skin.

For a moment Cas says nothing. His eyebrows scrunch impossibly closer. He takes a longer look at Dean’s shoulder, then straightens up, clears his throat and says, “I don’t know what you’re talking about,” in a stilted monotone that would fool absolutely nobody.

“Oh come on! You’re a terrible liar, I know that you can see there’s a handprint.”

Cas sighs. “Yes. There is.”

“What the hell, Cas? When were you going to tell me about the friggin’ mood ring on my shoulder?”

“Mood ring?”

“Patience said it was glowing brighter than ever and I guess I was feeling really happy and uh-”

The corners of Cas’s lips twitch up into a smile. “It was glowing that brightly?”

“Hey, nope, not the important thing right now,” Dean says, heat crawling up the back of his neck remembering why he’d been so happy. He gestures back at his incredibly normal looking skin. “Who else can see this?”

“Psychics like Patience…” Cas begins, a little hesitantly, “and other Angels.”

“Okay, this is starting to make sense ‘cause they’ve always looked at my shoulder funny.”

“And Demons,” Cas continues quietly.

“Wait, are you kidding?”

“And probably ghosts. Though I’ve never asked one.”

Dean takes a deep breath. “Okay. That’s great. Everyone but me can see my sparkly my little pony cutie mark-”

“I don’t understand what ponies have to do with any of this.”

Dean smiles before he can help it and Cas’s eyes flick back to his shoulder. Dean grabs at the skin there, but he still can’t see anything different. “Seriously? Just from you doing your,” he lowers his voice when he mimics, “‘I don’t understand that reference’ bit?”

Cas turns his head away, but Dean can see the crinkles at the corners of his eyes from the smile he’s trying to hide.

Dean sighs, knowing the warmth in his chest will only be making the mark glow even brighter. Damn it. “And it's always been like this?”

Cas turns back to him, the smile gone. “I healed the physical scar as soon as I could, but that mark was made on your soul. The glowing print it left behind can’t be healed away,” he says softly, “I’m sorry, Dean.”

“Figures.”

“When I made it… it was the only way I could bring your soul back with me.” Cas’s shoulders tense in that way that means there’s more, he just doesn’t want to say it.

Dean catches on. “Wait… it means something, doesn’t it? What does it mean?”

Cas holds his gaze but says nothing, lips pressed into a thin line.

“Cas? C’mon man, what does it mean?”

Cas closes the short distance between them (Dean hadn’t even noticed they’d been standing so close) and gently lays a hand onto the skin of his shoulder, over where the handprint would be if Dean could see it. He gasps when a hot jolt of something electric shoots straight through him and leaves his entire body tingling.

Cas finally says, “It means you’re mine.”

I have a deaf dog and I felt like Cas earlier with the way I stood over her, silently watching her sleep and admiring how adorable she was, and she never woke up because she couldn't hear me.

Viktor is my new favorite autistic icon.

Rewatching 'Lily Sunder Has Some Regrets' is such an enlightening experience. The amount of Destiel in this episode is insane. What do you mean a few seasons prior Dean gets mad at Cas for "personal space" and then literally sits on him at the diner, and then also basically cusses out Ishim for mocking Cas? What do you mean Ishim says he'll cure Cas of his human weakness like he did his own, aka killing his human lover, and then charges Dean with an angel blade. And what do you mean Cas lays there, nearly dead, and Dean forfeits blasting away Ishim because there's just a chance it might kill Cas. (Even though I think Ishim's full of shit there because I don't think it really would've blown Cas away)

Not to mention the entire episode was them having marital disputes because of Cas killing Billie to save Dean and Dean's 2 favorite people, and then giving a heartfelt confession about how much they mean to him.

Dean: * walks in wearing a shirt saying ""I'm Dean fucking Winchester"" *

Sam: What are you wearing?

Dean: Wait for it.

* a blushing Castiel walks in wearing a shirt saying ""I'm fucking Dean Winchester"" *

Sam: Oh... That’s... cute?

These lyrics right here. This whole song is Destiel coded.

Trees ll- McCafferty