Merthur 1940's WW2 AU for babyintrenchcoat
Merlin Emrys is an army medic. Arthur Pendragon is the son of a wealthy aristocrat. And they are both going to war. When the two are posted at the same army camp, they form a strong bond that will last them through the trials of battle.
But with the enemy creeping closer by the hour and the camp hopelessly outnumbered with little chance of survival, the two spend one last night in the trenches, huddling close and waiting for the light of dawn that could mean their deaths.
Merlin Reincarnation/Modern AU: Sometime after Arthur comes back, he and Merlin decide to adopt their own little bundle of joy. (Bonus Auntie!Morgana)
Merthur Club AU
The Rising Sun is the place to be and the owner Merlin is the best bartender in town. People flock to see him spinning bottles like a wizard, especially his best friends and a particularly snobby city boy called Arthur.
Modern AU | Snapshots: from New York to London, with love
[a moment, a love, a kiss, a cry, our rights, our wrongs. Won’t stop ‘till we surrender.]
Merlin AU; Guardian Demon P1.
In a number of accounts, the magical person or witch was experiencing difficulty prior to the appearance of the familiar or demon, who offered to aid them. As historian Emma Wilby noted, “their problems… were primarily rooted in the struggle for physical survival - the lack of food or money, bereavement, sickness, loss of livelihood and so on”, and the demon offered them a way out of this.
AU: Merlin and Arthur being shy idiots as they try their hand at dating.
AU Challenge + Hogwarts;
Merlin Emrys and Arthur Pendragon, despite being in different houses, were best friends throughout their time at Hogwarts. But when Merlin learns that he can speak parseltongue in his fifth year, he becomes obsessed with the idea that he is the true heir of Slytherin. In his research, he stumbles upon the legend of the Chamber of Secrets and the monster it holds within. Determined to find out more and what this beast could be, Merlin opens the chamber- releasing the basilisk. Arthur, worried by Merlin’s change in behaviour and recent distance, follows him one night and learns just what Merlin really is.
Merlin Football AU
Arthur Pendragon is the Captain and golden boy of the England football team. The entire country want his team - fondly known as the Knights - to finally lift the World Cup since the last win in 1966. Merlin is one of the biggest fans and the night before the big opening match, sneaks onto the pitch just to get a feel for the place. When he sees Arthur, however, he is slightly starstruck, especially since Arthur turns out to be just as affected by him.
Come to me, my sweetest friend
Can you feel my heart again
I'll take you back where you belong
And this will be our favorite song
Sin City/Merlin AU
Corrupt official Uther Pendragon runs Camelot, commonly known as Sin City. Little does he know his own son is working to bring his organisation down with the help of a magical rebel called Merlin.
Merlin/Warm Bodies AU for ammo121
Merlin is your typical zombie. He’s undead, eats brains whenever he can and isn’t a big talker. When he meets a survivor called Arthur, however, this all begins to change.
Merlin/Harry Potter Fusion AU - requested by lucifercaelestis
In which Merlin (now Headmaster of Hogwarts School of Witchcraft and Wizardry under the name of Albus Dumbledore) catches Harry looking at the Mirror of Erised and looks back on when he himself first found that mirror a very long time ago.
"It shows us nothing more or less than the deepest, and most desperate, desires of our hearts…but remember this, Harry, this mirror gives us neither knowledge or truth. It does not do to dwell on dreams…and forget to live."