"He's soft."
"Remind me who took your balls last week?" Draco sneered.
Fenrir lunged, but Draco did not try to stop him. Voldemort did, with a wave of his wand. "Peace... I want to hear your explanations, Drraaaco," he hissed.
"Hearts and minds, master," he said.
Voldemort tilted his head. "Explain."
"Fenrir, Yaxley and even my aunt... they can torture and rape anyone, but if you want to own them... you have to offer something more than pain."
"Nonsense!" Yaxley grunted, but Voldemort held up his hand.
"If you all keep torturing him into madness, what are you going to get?" Draco growled. "A mindless, speechless body. Like my aunt did to the Longbottoms. And are they useful there? Besides being an example? Potter is a prize... a prize that we shouldn't destroy."
Voldemort brought his fingers together. "And what use are you making of him?"
"He'll obey me... he'll listen to my every command... and he won't try to fight me or cower."
"He fucking obeys me!" Fenrir growled.
"He'll listen to me, too," Yaxley said.
"Yaxley, do you still torture Potter if he obeys you?" Draco inquired. Thank Merlin Harry had told him that bit.
"I do not... if he complies," Yaxley grudgingly admitted.
"See my lord? A willing slave or a cowering, beaten dog? If all you wanted was for Potter to lose his mind, then I will stop my efforts. But if you want Potter listening to your every request... attentively... then I can give you his heart and mind."
"Prove it," Fenrir growled. "If your way is so much better."
Draco waited for Voldemort to speak. "Lucius... bring our guest up here."
It only took a few minutes before Potter was thrown on the floor in front of Voldemort. He was shaking and curled up into a fetal position. Luckily, they had foreseen this happening. The Dark Lord would eventually make an appearance. This was the moment where they would win or they would lose.
Draco gestured to Fenrir to start and cocked his eyebrow in challenge.
"Get up and suck my cock, slave!" Fenrir growled at Harry, who cowered on the floor. Draco could just hear him mumbling pleas under his breath.
"Get up!" he screamed and kicked him.
Harry whimpered more and said, "Please...."
Fenrir growled and punched him in anger. He hauled him up, and Harry did it. "See?"
"I'm not impressed," Draco sneered.
Harry stopped and whispered, "Master?" Before Fenrir shoved him back into his dick to finish.
Draco had to try not to smile. Harry got the delivery perfectly. Voldemort looked at Draco, questioningly. 
"Apologies if I offended you, my lord. I couldn't allow him to call me Draco or Malfoy anymore. I can train a new honorific, if it offends."
"I can tolerate it," Voldemort hummed as Fenrir came and threw Potter to the floor, like he had won. Voldemort looked at him. "Your turn, Draco. Present your toy."
Draco bowed his head and stood. "Puppy? Come here." Harry lifted his head and found him. He crawled until he was at his feet, and there he waited. "Sit up on your knees, now." Potter complied easily. He was shaking, as he got onto his knees, clasped his hands behind his back and looked at the floor.