Fenrir could hear the screams of the other man and he glanced over from time to time to see what amusement Natasha was indulging in before returning to his own prey.
He danced backwards once he'd ripped open the man's stomach and watched with his tongue hanging out in a lupine grin as the man clutched at the wound, trying to keep his intestines in. Fenrir darted forward and caught a loop of intestine in his teeth and danced backwards again, the rest of the intestines flopping out of the wound in a steaming mess.
The Auror stared at Fenrir and his own guts, his eyes almost popping out of his head as fear and shock flowed off him. Fenrir stared back then shook his head and ripped a section of intestines away. He swallowed them down as the man choked and only now finally tried to crawl backwards.
Fenrir leapt on top of him and buried his face in the gaping wound in the man's stomach. He licked at the blood and the man struggled and screamed. he kept shoving his way into the wound, ripping things out and either swallowing them or tossing them aside until he reached the man's spinal cord. The man's scream and struggles had been getting weaker and weaker as he continued and Fenrir knew he would have to finish this soon if he wanted the man to feel the full effect before he died.
He buried his muzzle in the wound again and closed his jaws around the man's spine, crunching down and yanking his head back and forth until he was able to rip out a section of spine. He raised his head with the section and showed it the man. The Auror stared in shock then he gasped and went limp.
Fenrir snorted and sat down, crunching his way through the bones and spinal cord and swallowing them down. He licked his chops to clean some of the blood and gore off them then eyed the body. He really didn't want the bodies found quickly. He wanted people to wonder and question and look at the Auror's Office first.
He rose to his feet and grabbed hold of the body by the shoulder and started dragging it into the undergrowth.