The lost blades of Equestria

In the morning...
Andrew woke up first, then Charm, We then spent an hour trying to wake up twilight. When she finally woke up we travelled northwest until we reached Vanhoover. We assigned Twilight to go and scout for any safe way for us to enter, when she came back she had a look of confusion on her face.

"What's wrong my apprentice?" I asked while Andrew kept watch and Charm sharpened her kopis.

"There is a bar in the town with the assassin's crest on it." She said.

"What?! This world has its own brotherhood?! Please show me this bar Twilight." I said and we made a plan. Me and Twilight would enter the bar while Andrew and Charm kept watch from outside the bar, both of them would be backup in case we encounter any trouble.

"Let's go my apprentice." I said before we snuck into the town.

We snuck into Vanhoover with relative ease, I used the experience to teach twilight the art of stealth. Once we arrived in front of the bar I realized twilight was right! The bar sign was the crest of the assassin brotherhood, me and twilight entered and I was quickly recognized.

"That's one of the humans their hunting!" Shouted one pony, I drew my spear and readied myself for battle.

"My name is Shadow, this is my apprentice, and I hear there be assassins here." The ponies in the bar then grew worried.

"They must be templars! Kill them!" Shouted another pony, I sighed before me and twilight began to fight the bar ponies

Celestia was happy, she found the assassin’s last base of operations in Vanhoover. And to top it all off, a spy informed her that the humans were seen in the area. She readied her elite guards, the solar templars, to crush the final resistance to her rule. She was celebrating her coming victory when she looked at the calendar and saw that the Summer Sun Celebration was only a week away, and sending the solar templars to Vanhoover would take at least a week. She decided to send her royal guards instead to crush the assassin resistance and ready her solar templars to fight nightmare moon.

During the battle I saw that Twilight seemed to already be an expert in combat. Soon, Andrew and Charm joined in and we were winning the brawl when a hooded pony shouted:

"Stop!" We all stopped and looked at her. "It is clear to me you are being hunted by Celestia, if you truly aren't templars. Answer me, what is the three tenets of the creed?"

"Stay your blade from the flesh of the innocent." I answered

"Hide in plain sight." Answered Andrew

"Never compromise the brotherhood." Answered charm.

"Very good. Brothers and Sisters! These humans are not our enemies, but our brothers!" She said and the bar ponies looked at us and went back to their drinks.

"Who are you? How do you know of the creed?" Asked Charm. The hooded pony revealed her cutie mark and it was the symbol of the brotherhood.

"My name is Silver blade, but you can call me silver. I am the leader of the assassins, what's left of them anyway..." she said sadly.

"What happened to them?" Asked Andrew. Silver told twilight to go and study the art of the assassin in the brotherhood's library before she answered us.

"Celestia, Celestia happened." Said silver before she told us the story of their creed's formation

One thousand and one years ago...
During the great solar/lunar war
The war was in its climax, both sides laid waste to the land and conscripted ponies into their armies. To restore peace, a small group of ponies began to assassinate key figures on both sides and free conscripts. They eventually came together and became the Equestrian Freedom Group. They had two main factions, the Saviors and the the Heroes. The Saviors valued peace and free will while the Heroes valued order and control.

When Celestia banished Nightmare to the moon, the Hero faction joined the Celestial army to help maintain order in equestria. The Savior faction kept fighting to establish a new country, one of peace and freedom, separate from the kingdom of equestria. Celestia saw them as a threat to her lands and ordered a purge of anybody who is associated with the Equestrian Freedom Group. To prevent Celestia from targeting them, the Hero faction broke off from the EFG and became the solar templars.

The Savior faction (along with the remaining EFG) reformed itself into the assassin's brotherhood and created the assassin's creed to govern their members and to keep their group secret from the outside world. However, one member, named Iron Dagger, betrayed the brotherhood and became a solar templar. Through him , the brotherhood was systematically destroyed and the remaining assassins went into hiding. One thousand years later, the brotherhood is still recovering from his betrayal and Celestia's attacks.

Twilight returned just after silver finished telling us the history of their creed. we then began to tell our history to silver. Once we finished, Silver was amazed that our brotherhood lasted as long as it has. We began teaching our knowledge to the ponies, we began with our firearms and tactics. They were amazed at our armaments, which to them, was alien technology. They then taught us their knowledge, including information on the Isu artifacts that exist in their world.

"Here is where we know the Isu artifacts are located." Said Silver as she showed us a map of equestria. She pointed to canterlot, ponyville, phillydelphia, and los pegasus.

"Why haven't you gotten them yet?" Asked charm.

"These areas are controlled by Celestia and her solar templars. We can't get close without them knowing. Even if we did, there is no way we can escape without being identified." Silver answered

"Leave that to us, we can provide distractions while you obtain the artifacts." Said Andrew.

"We can also provide some support to combat their incursions in your turf." Said Charm.

"We can sabotage their forces and supplies to weaken them as well." I said.

"Thank you for your help and with it, we can complete our goal of establishing a republic of equestria." Said silver, Twilight then asked.

"Where do we strike first?" Silver thought over it before she answered:

"We shall strike in ponyville in one week..."