In Darkest Hours We See
Morgana, Merlin; Merlin/Morgana; Morgana is missing a piece of the puzzle.

At night Morgana dreams about the world burning. She dreams that she is the person who will light the match that sets it ablaze; she will sit upon her father's thrown and Morgause will smile at her in a way that makes her shine like the sun. Somewhere deep inside herself Morgana begins to doubt that these are visions.

Sometimes Morgana dreams of Merlin.
All goofy smiles and sympathetic eyes; Morgana drowns in his eyes like they are the ocean, like they are a sea of acceptance and understanding. She thinks the feeling in her chest must be hatred for the way they pity her because she feels it for Arthur and Gwen whenever she thinks about them. She feels it for Merlin the strongest.

In her dream Morgana is laying on her back in the snow and Merlin is looking at her with a smile. At least it looks like a smile on first inspection, but the world is upside down from her vantage point so she's starting to think it's probably a frown.
"Quite the pair," Merlin tells her, eyes shining a bright blue. "Always fighting each other," Morgana thinks she understands what he means. He's seeing the world from a different perspective and yet he still sees their relationship the same way she does.
"We're a vicious cycle," she tells him. "I destroy you; you destroy me, over and over, never ending." She smirks at him with all the confidence she can muster. "I'm going to win," she tells him.
"You're looking at it the wrong way," he says. Upside down, inside out, unforgivable, unsalvageable; that's how she sees it. She isn't wrong, she wants to say, he's wrong. "You're missing a piece of the puzzle," he tells her cryptically. She wants to stand up, wants him to help her see the world the right way up, but she doesn't know what she's missing.

She wakes with a start and her eyes quickly adjust to the dark of the woods. Off somewhere in her periphery Arthur mumbles things she cannot hear in his sleep, Guinevere lays motionless, the rise and fall of her chest the only sign of life. Directly in front of her on the other side of the fire Merlin sits against a tree with his eyes wide open; cautious and on guard. In the fire light his eyes almost look like they shine gold.