Equestria's new Moon

--Canterlot Castle--
-a little past midnight-

The moon shines brightly over a quiet Canterlot, and the only ponies awake are the lunar guards. As the guards move along their patrol routes, something else moves in the dark. A dozen dark shapes move along the shadows, blending completely in the dark. They crept silently, and stealthily through the courtyard and towards the castle proper.

As the dark shapes begin to climb the walls, they seem to have underestimated the night vision of the lunar guards. "Halt! Who goes there?" One of the lunar guards says to them.

"No witnesses," says one of the shapes to the others. They move rapidly move to surround the pair of guards that spotted them. The guards moving to defend themselves and stabbing at the shapes with their spears, and hitting nothing but darkness.

The shadowy thing just chuckles and says "Silly mortals. Metal can not fight the darkness." It then extends an arm that takes the form of a blade. It slashes through the guard's neck, letting the head fall to the floor. It's brethren finishing off the second guard with ease, but not before the guard could sound the alarm.

The alarm sounded the guards began to move in numbers. The reserves woken, and marching to the aid of their comrades.

"This does not stop our mission. The archmage dies this night, before he can recover." The lead shadow says to the others. It points it's bladed arm towards a window. "Two of you should be enough, we shall appease our blood lust on the native mortals."

Two of the shadows resume climbing the wall, as the others all form blades of their own and prepare for battle.

The guards charge into battle, as soon as they arrive. Bravely fighting, even as their weapons seem to do nothing. The shadows not even bothering to defend, until one takes a blast from a unicorn's horn. The magical beam cuts straight through the shadow's essence, tearing away entire chunks of it's form.

"Get the horned ones!" yells the lead shadow. Gaining the attention of another unicorn guard, who sends a beam at the lead shadow. The shadow blade moves swiftly and blocks the magical blast, deflecting it harmlessly into the ground.

The non-unicorn guards move to protect the unicorns, as only their attacks seem to be effective. "Guard the unicorns, their magic seems to be the only thing effective." One lunar guard captain yells. "We must hold the line, we will not let these creatures win this night. For we are the LUNAR GUARDS!"

Their moral restored, the guards move in unison. While their spears and blades could not harm the shadow, it could still block or deflect the blows of their swords. Unicorns begin to focus fire, even if the shadows could block one or two, the third or forth should get through.

"Withdraw.... we must inform the masters, the natives have magics." the lead shadow yells before melting into nothingness. The remaining shadows quickly follow, leaving the guards with their dead.

"Captain, two of those things were climbing up the walls and into the guest wing." A guard reports.
The captain quickly turns to others. "Alright, all those who can still fight. We move, two have slipped past us. We will find them and drive them back. The injured, stay behind and tend to your wounds. You have all fought bravely, but stay alert."
A dozen remaining lunar guards form behind their captain, followed by eight unicorn guards from the reserves. As soon as the ranks are formed, the begin to fly towards the window that two shadows were seen entering. Lunar guards giving the unicorns a lift.

--Canterlot Castle: Guest room--
-a few minutes after the start of the battle-

The two shadows climb in and one moves quietly towards the bed where Aidan sleeps, while the other keeps watch at the window. The first shadow moves closer and closer to the bed and Aidan's unmoving form. It begins forming a blade on it's right arm, raising it to strike.

"Who!" is heard in the room, causing both shadows to freeze and look around.

Cale stares at them from his perch on the wardrobe, wings outstretched. He takes flight, swiftly covering the distance to the bladed one, claws extended.

The shadow has no time to react as Cale's claws tear clean through it's arm, causing it to fall and begin to dissolve into nothingness. The shadow recoils, pulling it's stump back and tries to retreat. It tries to bring it's other arm up to defend, but moves too slowly. Cale continues it's assault, clawing at the creature with swiftness. Each claw swipe finding it's mark, tearing at the shadow's existence until nothing remains.

The last shadow, decides retreat is the best course of action. It simply melts away while saying "You have bought yourself time, nothing more."

The room is left quiet, and Cale returns to his perch. He barely lands and resumes his vigil before the guards burst through the window. "You won't get away with this vile villains!" the guard captain yells, landing in the room. The rest of the team following and looking for signs of the intruders.

The door burst open with great force, echoing in the room. Shining Armour rushes in, blade drawn and ready for combat.
He is followed by both Princess Celestia and Luna, as well as the Elements of harmony.

"Where are the attackers? Is everypony ok?" Shining asks, after noticing the guards and a lack of enemies.

"Is it morning already!?" a half asleep Aidan asks, as he slowly sits up. He stretches and lets out a yawn before looking around the room. "What's going on?"