#'stiles stop jumping into fights with your sword you have the physical strength of a bean pole' 'but it's EXCALIBUR'

[fluffypotatey]

Okay so it's only loosely a crossover (the characters don't directly interact until the end) but whatever.

Anyway, after 1500 years, Excalibur has become....kinda like Mjolnir (hammer of Thor) meaning it's semi-sentient and Will Not let itself be picked up except by A) Merlin, B) Arthur, or C) someone it knows to be worthy. The bitch don't stay in the lake, either. It goes where it's needed, and right now, that is the Clusterfuck of Beacon Hills, where it appears buried in a rock (commit to the bit) and when the pack finds it, everyone has a good laugh bc they think it's a prank....except none of them can pull it out. Even with super werewolf strength.

But Stiles can.

(Deaton almost has a fucking stroke when he sees it)

And the rest of it is kinda just vague monster fighting shenanigans at this point, tbh, with plenty of Sterek (obviously) and also Stiles learning magic (I swear I'm not bitter) and at one point there is a dragon that does not get slain but very politely agrees to find a different plot of land to claim after "the blade-bearer" asks her to please leave.

Legit Merlin and Arthur only show up in BH at the end, after the crew is Tired and Bloody and Just Wants A Nap, and Merlin's like, "Christ, can you never stay where I leave you, you overgrown letter-opener?" to Excalibur, and Arthur is just like, "DON'T BE MEAN, MERLIN, hey, kiddo, can I have my sword back now?"

Leaving the rest of them to just be like "..........." bc they just met THEE King Arthur and Wizard Merlin, and they were dressed like a spring break Chad and his prep-goth lesbian wife.

lmao love how Merlin and Arthur come like they've just finished their honeymoon (well deserved tho)

but yes of course Excalibur ends up at Beacon Hills (a beacon for the supernatural am i right? eh?) just sitting pretty in its rock, chilling. it probably didn't even expect to be picked up by anyone other than Merlin or Arthur. sure, Merlin had said "someone [the sword] knows to be worthy" in his spell, but that was never meant to actually happen.

then the McCall Pack saunter in (well, maybe not saunter....more like stumble into the sword's domain because of some outside force or something) and begin their fun little challenge to see who gets to pull the Excalibur out of its stone. it's the most fun the sword's had in ages. then fucking Stiles Stilinski goes to pull out the sword as a joke.....and Excalibur feels its hold on the stone loosen.

oh dear

and you know, you'd think the sword would be pulled out for Scott (main protag and true alpha, all that jazz), but the sword is in Stiles's hands, and now all of them are freaking out (Stiles is the most smug he's ever been, much to the annoyance of everyone).

and then after all the shenanigans are over and our lovely Arthurian duo come in to retake Excalibur. cue Arthur and Stiles becoming petty rivals over the sword because i said so.

Stiles: Finder's keepers Arthur: Uh, no, that's my sword Stiles: And you abandoned it for a couple centuries, and it chose me, sooooo...mine now Arthur: Merlin-- Merlin: No, no, the kid's got a point. I mean, you were dead for 1500 years, give or take Arthur: ....yOU thREW the dAmN sWOrd iN thE fUCkiNG LAKE