Retribution

Three days later the prisoner transport reached the base in the middle of the night. Trixie was still unconscious in the floating force field bubble.
“Bring her down to level five.” Night Hawk said to the scouts.

Night Hawk entered Firebolts room and found his leader sleeping. His wounds were almost healed, only one little bandage around his flank remained.
“We brought Trixie to the interrogation room in level five.” He reported.
Firebolt awoke and yawned. “Thanks. I’ll come in a couple of minutes.”
The Pegasus left the room and went down to the captured mare

Trixie opened slowly her eyes, winked and saw a bright light in front of her. She tried to put her hoof between her eyes and the blinding light but she couldn’t. She looked around and found herself fixed on a table in a dark grey room. The room had no other light source than the lamp above her. She turned her head to the left and spotted a little table beside her. The bloodstained instruments of torture let her panic.
She became even more frightened when the door opened and a pony entered the room. The mare tried to catch a glimpse but the only thing she saw was the shape of an alicorn. “W-Who are y-you?” she stuttered scared.
“Just somepony you’ve had better killed.” The alicorn answered mockingly and stepped into the light. She was paralyzed in fear as she identified her opponent. “F-F-Firebolt?” was the only thing she could say out of fear.
He stepped towards the little table and looked at the tools. “Hmm … How should I start?” He thought aloud and took a saw.
“W-What are you d-doing?” Trixie asked scared.
“Just take my revenge.” Firebolt answered smirking. He bent over her head and looked into her eyes as he positioned the saw on her horn.
“Wait!” she cried as he started to cut off her horn.
“Why should I?” he answered still facing the mare.
“I-I’m sorry for attacking you b-but please let me keep my horn.” She whimpered.
“You don’t need it anymore.” Firebolt answered as the color of his iris changed from a deep blue to blood red.
“A-Ap…” She started before Firebolt put his hoof at her mouth.
“Stop talking.” He said smiling and calmly as he duct-taped her mouth.
Tears were running down her cheeks while he cut off her horn. She panicked as she saw Firebolt laying the saw aside and took a small knife with curved blade. The mare groaned in pain as he sliced her left foreleg.
“Too painful?” he asked smirking and injected her some painkillers as she nodded. He continued with the other foreleg. The blood spluttered as he cut an artery.
Firebolt changed the knife with the big hammer which leaned at the table.
“That could hurt a little.” He said as he swung the hammer at her right hindleg. As the Hammer hit he heard the bones cracking.
The mare screamed in pain. “S-Stop it!” she tried to yell through gritted teeth.
“What?” Firebolt asked as he ripped off the tape.
“Stop it!” Trixie whined.
“You’re really begging for your life.” He smirked and swung the hammer again. The hammer hit her chest which caused her to spit masses of blood. She prepared for the next impact but it didn’t came. Trixie looked around but the only thing she could recognize was her view getting blurred. She felt her will to live leaving her. “Where are you?” she groaned.
“I’m right over here.” Firebolt said as he swung the hammer a last time.
The last thing Trixie saw before she passed away was the hammerhead dashing towards her face. The hammer shattered her skull as he hit it. Blood splattered at the ground, the walls and even at Firebolt.
The color of his eyes went back to the deep blue. Confused he looked around and at the slaughtered Trixie. “W-What have I done?” He stuttered suddenly full of doubt.

Night Hawk waited in front of the interrogation room. A few minutes before he had heard the mare’s screaming but now he only heard the silence of the night. The door opened and he saw the bloodstained Stallion stepping outside the room.
“What happened?” The Pegasus asked astonished.
“I lost control.” Firebolt answered sadly. “It seems that I have got into blood frenzy.”