"Stand still!" Pinkamena ordered.

"I can't calm down when It's pitch black!"

"Stop being a pussy! And stand still, So I can cut these ropes!"

Pinkamena found Mane's ropes tying his hands in the back, and with the a blade of the size of her pinky finger she slowly cut the them. She always had It hidden between her belt and her back, just in case she would ever be captured. She struggled to reached It with when she had her hands tied in her back, then cutting them with a strong grip on the little handle, then releasing Mane.
And for her surprise, Mane hugged her in fear, just to receive a gentle slap and a push.

"Why are you afraid, anyway?"

"I never liked the dark! Never!"

"Childhood issues..?"

"No. It's just... I don't like It..."

"Just being a sissy?"

"No! I already have my nightmares!" He groaned.

The cell was just a cube made of stone with no windows. No lights or even a match to provide a little of It. It was stinky and moist, and the moss could be felt in the dark by their hooves and hands.

"Mane, come here."

"Where are you?"

"Here, follow my voice."

"I'm trying, but the dark confuses me!"

"Well, forget about It! How do you even sleep at night then?!"

"It's a different situation!"

They kept touching the air until the bumped at each other on their heads. Pinkamena had no problems, but Mane's wounded face made him flinch and take his hands to the aching forehead.
Moments later, Pinkamena found him covering his face, and groping his face finding his horn and removing the magic ring on It.

"Thank you... I need some time."

"For what?"

"To recover. The effects of these don't wear off that soon."

"Okay, take your time..." She walked by the tiny cell trying to not shock against the walls. "If there was a way to tell them we were in this situation, they could have come and rescue us."

"Well, you are full of surprises, can you pick a lock?"

"I can but I don't have the tools. They took away my weapons except my hidden blade..."

"Would that work?"

"Of course not!"

Mane found one of the corners of the cell and sat down on the mossy floor, and Pinkamena almost tripped on him while walking around. His head was a mess, feeling to weak to perform magic and the darkness was driving him mad slowly. He started to shiver with the uncomfortable place, even if he had Pinkamena's presence.

"What is that sound?" She asked.

"It's me... I'm afraid..."

"Oh for Celestia's white butt! Stop being a baby!"

"I can't! Ok?!"

"Then... do like me!"

"How so?"

"If you are in danger, be one with the danger! Be part of It!"

Those words echoed in Mane's mind. Reminding him of his last dream, something that his uncle told him:

"What does he mean..?" He whispered.

"What?" She asked confused.

"Sorry, I was talking to myself."

"Just don't go insane!"

Mane stopped all the other thoughts in his head, he leaned forward and rested his arms on his legs, and he started puzzling something in his memories.

"What we could do, he said... but what did he knew?... The pact gave him powers that nopony in Equestria would knew... Strength, power, wisdom, magic... magic... He made It the before I was born, my grandpa said... so maybe It's hereditary? If I have the same blood how he calls then maybe I can do It too! But what could he do?"

"Pinka, I need your help."

"How can I help in the dark?" - She asked in a sassy way.

"I need you to touch the walls, every inch there is."

"Did you finally become crazy with the dark?"

"Just do what I ask."

Pinkamena groaned on the strange order and started groping the rock walls, trying to think what has gone on his mind, while Mane kept thinking and thinking in what he could do with such hidden potential. She passed by the door, and putting her ear against It, she confirmed there was no guards.

"Mane. I have good news, and bad news. Choose..."

"Uh? The good ones."

"There are no guards by the door, but the bad ones are... I don't why you ordered me to go around touching walls in the dark..."

"See if you can find a gap."

"How is a gap gonna help?!" She stomped the floor in anger. "Just recover your magic and blast this door open!"

"No! That would alert them, and we have the minor advantage. No weapons and they have those guns, and my magic wouldn't be enough."

"Argh! Fine! You better come up with something or I'm gonna beat you even more than what they did!"

Mane returned to his meditation, with Pinkamena walking around touching the walls again under frustration. She started to look higher almost by the ceiling, and her hands met a hole with rusty surface.

"Shaker! I think I found something!"

"What is It?"

"It's very small but feels like an air conduct. Circular, rusted, moist and... maybe fifteen centimeter diameter?"

"Ok, you can stop and rest..."

"Are you shitting me?! I swear I'll..." She closed her fist and threw a punch, and backed away holding her hand in pain, figuring out she punched the rock wall.

"Seems somepony forgot we were on the dark and we barely know where each other are." Mane said with his eyes closed trying to focus.

"Fuck you!"

"Pinkamena! Will you stop being childish and let me think?!"

The pink mare pouted and sat on the dirt holding her hand trying to relieve It from the hit. While Mane kept silence and started to massage his head trying to come up with something.

"Diane. What did you said about danger?"

"Be one with the danger, fucktard!"

"Be one..." He whispered gaining focus on his mind. "Be one with the dark..."

"What..?"

"Embrace the darkness..." He continued.

"Embrace the darkness... be one with the darkness... you are the fear... you are the danger... Embrace the darkness! Be one with It!

More he thought about It, more he stopped feeling his body, but he didn't notice until he couldn't feel his legs completely, but a strange feeling instead. The feeling that the dark was consuming him even more, as if It was finally driving him crazy. He kept focusing and meditating even more, until a quiet swooping noise was heard.

"Mane?"
...

"Hey, are you there?"
...

"Answer me dammit!"
...

"That's not funny! I'll swear I won't miss your face next time! Even if It's dark!"

Seconds later, a small light showed up in front of her. Diane tried to touch It but It passed by her fingers. The light became a bit more alive and started turning red. In some seconds, It became even more brighter and Mane's face showed up surrounded by what could be a mist, frighting Pinkamena making her heart race with the scare.

"Hey Diane!" He said happily.

"I got you now, smartass!"

But her fist went right through the fog, making her confused, and she tried to punch and kick his nonexistent body, and he just saw her struggling to land a hit on him.

"What the actual fuck?! Where is your body!?" She asked startled by his appearance.

"I figured out, Pinka!" He smiled.

"What?! How to die and become a ghost?!"

"No! This was one of my uncle's powers! Only those with the "Sombra blood" can do It! This is what he meant!"

"Get away from me, you creep!" Pinkamena begged disturbed.

"Allow me, but It's the creep who is gonna allow us to get out!"

And his face turned in a black fog and went thought the pipe Pinkamena found previously.

"Hey! Don't leave me here, you dumbass!" She screamed afraid. "What the fuck was that..?" She whispered trying to wrap her mind on what just happened.

The pipe was a mess, but he felt luckily for being now a cloud of smoke allowing him to not get dirty. Besides that, Mane was utterly happy with his new power and thinking of the possibilities in the future, also what could be the next power he didn't knew about.
His body was now a cloud of black smoke, and he could show his face only, to keep his new form working, or else It would go out completely.
For rare occasion, he was happy for being of the Sombra bloodline and having the privilege of such power and other hidden ones waiting to be found.

He traveled down the pipe and reached to a crossing.

"Pff... easy!" He said and tried to ram the pipe's walls, but his face met It completely. He backed from the pipe's walls flinching n pain and trying to keep his form active or else he would meet a painful death in being squashed inside a pipe.

"Seems I'm not a true ghost how she said. Alright... let's take the left."

He took the turn and It ended on a air duct. He traveled down and met the hatch leading to the kitchen, making him go back in his route and meeting the other divisions of the big house, crowded with gangsters armed to their teeth with muskets and pistols.
Mane went back and forth in the air duct trying to find an exit to the cell where he left Pinkamena, and by passage he heard a conversation.

"Boys. Don Topaz told me to check on the hostages."

"I'll go with you. Let me just finish this game." Said one of the thugs with five cards in his hand. "I'm on a stream of luck!"

"I'll pass. The air in that place make me sick. I'd rather smoke three cigarettes than go down there!"

"Gotta be quick!"

He rushed back to the pipes and turned on the ones that only went down to the huge basement section, eventually found the exit and left the pipes, now being a cloud of dark smoke in a room with a small corridor.
With effort, Mane ended his new form and we could feel his body again, touching his face in pleasure of his discovery.

"Can't wait to surprise Sigil and the others with this!"

The door in the small hall opened and Mane rushed between a shelf an a corner, and two thugs with muskets passed by without noticing.
They walked side by side until the iron cell door and opened It, and Pinkamena was standing on her hooves and hands free. They pointed the muskets and her and she rose her hands in the air scared.

"Where is the other guy?!" One of them shouted.

"I... I don't know!" She replied.

"Don't play fool on us! Where is he?! How did he escaped?"

"I swear! He became a ghost and vanished!"

The thug gave a step forward putting the musket's barrel on her head.

"Go warn the others. We have a fugitive."

...

"Hey! Did you hear me?"

The thug turned around, he faced Mane finishing his companion by cracking his neck clean and silent from behind, before he could scream, Pinkamena cut his neck with her hidden blade, but before perishing he shot the musket in the air.

"Took you long enough!" She groaned.

"Let's not waste time!" Mane grabbed his victims pistol and passed to Pinkamena. "The others heard the shot, they are coming, I'm sure of that!"

"Take the muskets! I can't work with them due to their weight!"

"You take the pistols then!"

"It was from here! Check your weapons!" Sounded a faded voice in the distance.

"Here they come!" Pinkamena smiled with an evil expression.

"This new power may come handy for the battle..." Mane said with an evil grin too, contemplating a black smoke cloud in his hand.