This is less Sexter/Saraxter/Saravex, and more Saracen
In his dreams, Saracen woke up. The floor beneath him felt cold against his bare skin. He opened his eyes dazily, but darkness stretched far, and he could only see a few yards in every direction. His wrists and ankles were weighed down by heavy shackles, and as he stood, he felt burdened by the extra load. Unsteadily, he started walking.
Somehow, he could recognize how long he had been in this dark room; it had been a while. He didn't know how he knew this, but he did.
He walked, seemingly for forever, but the length of his chains was never-ending, and the room was incessant. He had walked so long that if he walked any father, he was sure to pass out, so he lowered himself onto the cold barren floor and curled up into a small ball. Yet, he was interrupted; thin shadows crept animatedly from the darkness, and began to curl around his limbs and stretch him out. Saracen tried to scream, but no sound would escape his lips. The shadows tightened around him, squeezing until it tore into his sun-deprived skin. More shadows slithered around him, traveling up and around his chest, and spreading his thighs apart. The shadows, malicious and sadistic, took every pleasure in hurting him. They laughed when he tried to scream, and squeezed harder when he didn't react.
Saracen woke up again. He was being hauled onto a medical bed by men in long white medical coats. He screamed and screamed and this time, a harsh shrieking noise broke free from his mouth. The men- who he understood to be scientists- strapped him down to the table. He struggled and kicked and punched, but all of his knowledge of fighting had suddenly diminished. LET ME GO! LET ME GO, he cried. They ignored him. Instead, they cut his body apart- limb by limb, and reached their hands into Saracen's gut, pulling his intestines out. They were looking for something, but Saracen didn't know what. The scientists didn't tell him.
Saracen woke up for real this time. He was covered in his own sweat and tears, breathing heavily, and he felt a certain detachment from everything around him. All he wanted to do was lay down and fall back asleep, but he knew he wouldn't be able to.