New Challenge: Allusive
Literature and art constantly refer back to each other using allusions, and this month's prompts are inspired by allusions to literature, myth, art, and history.

A clan of Easterlings makes their way into Beleriand, where they forge an unlikely friendship with the very people they are supposed to betray.

For Túrin, nothing turns out as he planned.
A series of drabbles (according to Libre Office) inspired by (of all things) the Sitcom! Bingo challenge and the Narn i Hîn Húrin.

Maglor rescues Celebrían before the orcs take her deep into their caves. Life in Imladris will never be the same.

A strange ship sails into Lindon. Who could it be?

Maeglin’s point of view after his betrayal and before his death.

A series of misadventures has left Galadriel in disgrace; Finarfin thinks a summer with Olwë might help his daughter find her way. After all: nothing exciting ever happens in Alqualondë. A story of questionable fashion choices, growing up, and finding one's place.

The children of elves die easily, for their souls are thinly bound to their bodies and their fate is to endure but not survive. So when faced with a young hostage he really can't afford to let fade away, Sauron is very careful not to do anything too traumatizing.
(Mostly.)
Luckily Feanor's grandson is an interesting child to babysit.

After the Sack of Eregion, the situation for the elves is dire. Celeborn's army is on the verge of being caught by Sauron when unexpected help arrives.

In the rush to depart for a Yule celebration in Taniquetil, Amrod and Amras are accidentally left behind by their family. When two skeevy Maiar vying for Melkor's attention set their sights on Fëanor's treasury, only these two can protect it.
Yes indeed, it is a Silmarillion/Home Alone crossover.
Added Chapter 13 onward--now complete!

Luthien runs into a strange and batlike creature on her way to rescue Beren.

Celebrimbor, Curufin and Celegorm in the aftermath of Fëanor’s death.

Celebrimbor is his father’s son.
(snapshots from the life of a more Fëanorian Celebrimbor)

During her forced marriage to Brodda, Aerin is consoled by the presence of Rían’s ghost. (Two versions of the story: chapter 1 in prose and chapter 2 in alliterative verse.)

Haleth and those who followed her. (Haleth/OFC. Two drabble sequences and a 250-word fixed-length ficlet.)

Míriel has a mysterious encounter after a Festival of Uinen at Rómenna. Much later, facing death for herself and her people, she makes a bargain with the Lady of the Seas.

When the sons of Feanor come to Doriath to claim the Silmaril by force, Elurín and Eluréd learn that evil is not always beastly and that sometimes, the monsters from your nightmares are the only hope at hand.
The Silmarillion/Doctor Who crossover
Or: "The Angels Take Doriath" (my working title)
“People assume that time is a strict progression of cause to effect, but actually – from a non-linear, non-subjective viewpoint – it's more like a big ball of wibbly wobbly... time-y wimey... stuff.” [Doctor Who, Series 2, Episode 10 „Blink“]

S.A. 583. The one where Maglor dares to hope again, and the river-daughter leaves her nest. Featuring: Ossë, Uinen, the Baranduin, the Men of the Minhiriath, and Eriador Avari.
Or, Tom Bombadil and Goldberry, before they became Tom Bombadil and Goldberry.

Celebrimbor has a realization about his partner, Annatar. Written for the Matryoshka Challenge 2018.

Celegorm decides to take a break from the Siege of Angband to spend time with his youngest brothers in the one hobby they all enjoy. Things go awry, and that's the fun part.

Even the most twisted tree was once an innocent sapling. Written as a treat for Amyfortuna, Trick or Treat 2018.

Elladan really wasn't planning to get thrown back in time to Beleriand, but the world didn't bother asking his opinion. Now, he struggles to find a way back home as the First Age unfolds around him. The host of newly acquired relatives, including a great-uncle with a flair for dramatics, sons of Fëanor who insist on being people rather than historical villains, and a several-times great-grandmother with some unexpected skills, just make it more overwhelming.
And where is Gil-galad, anyway? Shouldn't he be around here somewhere?

The story of the eighth companion of Finrod and Beren to die in the dungeons of Tol-in-Gaurhoth.

"All right, hunting down Daeron the Minstrel: that sounds like fun. But where would we even begin to look for him?"