Retribution

Firebolt was asleep for a few hours as the horrified messenger entered the sleeping room, “We have news from hell, My Lord.” He reported without noticing that he woke up the stallion, “The guards found a tunnel which leads to your old homeland in the north.”
“Tell Shadow Hunter she shall have two soldiers stand by.” Firebolt yawned while he stood up from his bed and fixed his messy mane, “I will meet them in ten minutes at the gates.”
“I am on my way.” The messenger said as he left the room.
Firebolt went down to the armory and take one of the helmets with the inbuilt radio and put on one of the high-tech armors. A dark greyish material covered him which would absorb most of the damage he would get. The armor protects his user from every known spell. He also took a combat knife and one of the personal defence weapons his chief engineer invented a couple of months ago. He checked his Equipment and left to meet the others.
At the meeting area he saw in the dark of the night two other alicorn stallions waiting for him. Both were covered by exact the same armor. “Good choice, Shadow Hunter.” he thought while he gave the two stallions the details for their mission.
Before the three started Firebolt extinguished his mane for being more inconspicuous in the dark of the night. His mane and tail turned short and grey as ash.
Afterwards he spread out his large feather covered wings and jumped into the air to fly together with his companions in an unbelievable speed northwards. He folded down the protective goggles which were attached to his helmet.
Soon after they started they reached the snow-covered north of Equestria and later the border to his former home Nordheim.
“Spread out!” Firebolt yelled, “We have to find the entrance quickly!” “Affirmative!” he heard both of the soldiers yelling before they left the formation.
After about fifteen minutes of searching one of the two others reported that he found the tunnel and sent Firebolt the coordinates. “Guard the entrance until I sealed it! Nothing is authorized to leave hell through this exit.” Firebolt yelled into the radio, “I will come as quick as possible.”
“Affirmative!” he heard the voice out of the radio answering while he changed the directions towards the coordinates he received.
Shortly after Firebolt left Firestorm and the others arrived at the camp. Just in the moment when Firestorms hooves touched the ground Night Hawk turned visible. “Where were you coming from?” the frightened alicorn said.
“Firebolt has ordered me to protect you while you’re outside of the base.” the dark blue Pegasus smiled.
A light blue alicorn mare with blonde mane and golden streak in her blonde tail stepped towards the new arrivals. “Hello, I am Shadow Hunter, Firebolts second in Command.”
“Where is he?” Firestorm asked.
“He left to seal the tunnel Apocalypse dug to escape from hell. He should be back in a few hours.” the mare answered softly, “Come along! I will show you where you can sleep for the next couple of days.”
She went back to the main building followed by the Princesses, Twilight, Pinkie, Fluttershy, Rarity, Apple Jack and Rainbow Dash. Only Firestorm and Night Hawk remained outside.
“So you had the order to protect me?” Firestorm asked, “But how could you protect me when you weren’t with me?”
“That’s simple.” Night Hawk answered as he turned invisible.
“Where are you?”
“I am just behind you.” He said while turning visible again.
“And what are you?” the Prince asked amazed.
“I am special.” the blue stallion said as he fooled his opponent again.
“Seriously stop that! That’s creepy.” Firestorm smirked as he realized that the Pegasus was again in his back.
He took a closer look at him but can’t see any technology that could be the cause of the invisibility. He looked closer at his cutie mark a dotted shape of a pony.
“Let me guess your talent is turning invisible whenever you want.”
“That’s why I am one of the five non alicorns in Firebolts brigade.”
“Come on!” they heard a mares voice calling, “You can talk tomorrow.” They turned around and saw Shadow Hunter stepping towards them. “Come on. It’s a bit cold outside. I don’t want you to catch a cold. And Rainbow Dash is awaiting you in your room, Firestorm.”