Disclaimer: I own nothing!
Murtagh opened his eyes; he let them adjust to the darkness. He recognized where he was almost immediately: in the dungeons of the castle. He tried to remember how he got there, but all he could remember was the battle. Murtagh quickly put the battle out of his mind and tried to reach out through his mind to Thorn but there was a barrier blocking Thorn from him. Just then he heard footsteps and the clanging of armor and sure enough two guards were standing in front of his cell. One of them was tall and skinny while the other was short and stouter looking, the taller one looked a bit nervous as he unlocked Murtagh's cell. They each grabbed one of his arms and roughly pulled him to his feet and began to drag him towards the familiar path to Galbatorix's throne room.
They got to the tall double doors that led into the room where Murtagh knew he would be experiencing pain beyond belief. He braced himself as the doors opened for whatever was to come. "Thorn" he called out through their mental link almost desperately.
"Don't bother" said a cold voice from deep inside the room which was so dark that you couldn't see anything at all. Murtagh felt the guards release him and shrink out of the room. "TELL ME WHAT HAPPENED." Boomed Galbatorix's voice, which seemed to be coming from all over.
"I tried." Replied Murtagh boldly, compared to how he felt. "He was too strong. I couldn't over power him." And then he saw Galbatorix's cold dark eyes only inches from him.
"Do not lie to me." And then without warning, Galbatorix tore his way through Murtagh's mind. Murtagh saw the whole battle replaying in his head, all up until the point where he let Eragon go, and left the battle. He felt Galbatorix withdraw from his memories, and Murtagh fell to his knees, trying desperately to catch his breath, when he was kicked square in the chest by Galbatorix's steel boots. Murtagh was sprawled on the floor of the throne room; he opened his eyes and saw Galbatorix standing over him.
"You. Will NEVER disobey me again." And with that he whispered words in the ancient language, and Murtagh felt pain in every inch of his body, it felt like every single one of his pores was exploding and all of his insides were being stabbed over and over again, this went on for what seemed like hours. When the pain finally subsided he was suddenly wrenched to his feet only to be punched back down by Galbatorix who then proceeded to kick and punch him until Murtagh wasn't even able to move. He lay on the floor waiting for someone to take him back to the dungeons where he knew more punishment would be waiting for him. But instead Galbatorix wrenched him to his feet again and told him to go to his old chambers without the help of anyone, and that he would be joining him shortly.
Sorry if this is bad, guys, it's my first fan fiction sooo any constructive critisism is welcome