I want them goooone. Note that by this list's very nature I have read basically none of this yet, but I sort of want to read all of it, so. No, this is not a rec list. But it could be.
Edit the Sad Parts, a trans!Merlin AU which I REALLY NEED TO READ. It looks hella long, so. Find the time. Seriously.
The Easiest Thing, I actually wanted to rec this, but I never found the time. Summary goes: Merlin spells himself to be the perfect servant, and loses his whole personality in the process.
Untitled Will is reincarnated as a kitten.
Guitar Tutorial Merlin and Arthur are YouTube guitarists.
Some arts, Merlin and Arfur meet on WoW.
Three Immortals, a Misfits, Torchwood and Merlin crossover. Reincarnation angst.
Some vids, a Kiss With a Fist A/M vid!
Lesbian!M/A Highschool AU, yes, 100% genderswitch, and still with the "confusion over sexuality" clause. IDEK.
Reveal arts!, Arfur finds out some thinnngs. In comic form.
Arthur returns, from an 8-months siege at war. COMICS.
Only Fools Rush In, a HP/Merlin crossover fic.
Saucery's Masterlist by Fandom, with Merlin and Sherlock and Torchwood.
PRON:
Merlin wants to get pregnant. Sort of. Porn ensues.
More thar-will-be-mpreg porn.
Lots of goddamn porn:
[Merlin] Bestiality Portal: No, I'm not joking.
Not Afraid: Merlin is worried about what his magic will do if he comes. Arthur gets assertive about making him.
To Break and Blossom: A/M, c/ding, bdsm, arthur hasn’t seen merlin in eight months.
Simultaneous Wanking: In a tent.
Arthur hates Merlin: No, really.
Desperate Times Call for Desperate Measures: modern!AU, business!Arfur, c/ding, angst-then-porn.
Sweat: armpit!Porn. I can't believe I haven't read this yet.
While the Iron is Hot: Nng, Gwen/Morgana, dear lord this is. Smithing is involved.
Forgiven, But Not Quite: A/M, Highschool locker room porn.
Untitled: the prince's whore.
Three Stories for one Prompt: Arfur claims Merlin as loot during a campaign.
Untitled: daddy!kink. By skellerbvvt.
Hold Hard: Too sore to sit up.
Single-minded: Naked!Merlin, clothed!Arthur-and-Lancelot.
jizz in my pants: Titled is self-explanatory, but the story is nicer that it would imply.
You Can't Really Sing Unless You've First Been Mute: not-fun-whipped!Merlin. I have not read this yet, but it is by skellerbvvt so I should.
A/M Spanking: a prompt.
Untitled: Full bladder sex. Arfur is a mean bastard.
Werewolf!Arthur: Mating ritual.
Short: See my avatar for reference.
COMPLETELY DIFFERENT FANDOM:
A bunch of Derek/Spencer fics from a great Merlin author, huzzah!
Daily Deviant, HP porn.
Chocolate Frog, McKay and Arionrhod's fic. Not to be confused with Arianrhod.
Into the Dark: Jack/Ianto, Jack/Gwen, angst. He lived because the gun misfired and that's when Jack noticed.