“It is you,” Ren murmured.
His words unsettled her: Not for the first time, he seemed to know more about her than she did about herself. But she had no time to ponder his comment, nor was she inclined to do so anyway; she was too consumed with rage. Holding the haft of the lightsaber in both hands, she ignited the beam— and charged.
[..]
Though Ren was bigger and stronger than Rey, their struggle had nothing to do with physical size. What she lacked in mass, she made up for in ferocity.
For a while she actually drove him backward, until he regained his self-assurance and in turn pressed her. The fight continued to shift back and forth; first he gained the advantage, then an enraged Rey took it back.
There was a vast rumbling, as of a continent sighing, and a gigantic chunk of forest behind Rey simply collapsed downward, leaving her fighting on the edge of a cliff so high that the newly formed surface below could not be seen through the rising cloud of dust.
Ren held his lightsaber, poised to strike. “I could kill you right now. But there is another way.”
Breathing hard, Rey looked up in disgust at the man looming above her. “You’re a monster.”
“No. You need a teacher.” He was beseeching and insistent all at once. “I can show you the ways of the Force!”
Slowly she shook her head. “The Force?” That was what this was about? Instead of moving to defend herself, Rey closed her eyes. Ren hesitated, confused by her actions.
A long moment passed, in which Ren sensed a change in the air, a change in her. Then she opened her eyes and attacked, viciously, in a way she didn’t know she was capable of, striking again and again as Ren was slowly driven back. The flaring energy from the interacting lightsabers was more pronounced than ever in the flurry of her attack. And—Ren went down.
He was up again in an instant, but not in time to fully deflect a following blow from Rey’s weapon.
He succeeded in blocking it, but he still took the full force of the strike against the haft of his own lightsaber. The weapon went flying into the snow. Unarmed, he raised a hand and utilized the Force to fend off one slashing blow after another, until finally her fury penetrated his remaining defenses.
Taking a glancing blow to the head and chest, he went down, a prominent burn slashed across his face. Weakened, he reached out toward his lightsaber, trying to draw it to him.
One downward cut, she saw. One quick, final strike, and she could kill him. The landing lights of a shuttle appeared in the distance, coming over the trees in her direction. She had to make a decision, now.
Kill him, a voice inside her head said. It was amorphous, unidentifiable, raw. Pure vengeful emotion. So easy, she told herself. So quick.
She recoiled from it. From the dark side.