Valkyr walked with Luna through the dark halls of the old Tenno dojo. A blue glow from Luna's horn giving some light for them to see. They were both constantly on the lookout for threats, or even any signs of life.

Every once in a while, Luna's ears would twitch at the faintest noise, but it never seemed to be anything to be concerned about.

"We should be near the main hall." The Tenno said without even looking back at Luna, "I would assume he's there."

"I've been meaning to ask," Luna said, "who exactly is he?"

"You'll find out soon enough." Valkyr responded. The rest of the way to the hall was nearly silent; the only noise being that of the reactors a few floors below, and the footsteps of the pair.

They came to another of the circular doors, but when this one opened, there was a massive room. So large in fact, that the glow from Luna's horn was not enough to reach the far end.

"Welcome home..." A male's voice hissed, "oh, and who might this be?"

"Her name i-" Valkyr began, but Luna cut her off with a wave of her hoof.

"I am princess Luna, co-ruler of Equestria." She said.

"Ah, a princess? I can't say I've heard of this Equestria, but I suppose it counts for something. How may I be of assistance?" The voice echoed, so Luna couldn't tell it came from in the shadows.

"I must return to my kingdom. We were attacked by a being of darkness known as Sombra. He cast me through an empty storm." As Luna finished, Valkyr glanced to her side, and saw a familiar pattern of red lights, and it was getting closer.

"An empty storm..." The voice repeated. "What exactly happened in this storm?"

"It was trying to tear me apart, but I drained my own magic to shield myself. I have been recovering these past few days."

"I mean what did the storm look like?" He pressed.

"Nothing... It was simply a vast, empty, white plane."

In a moment, faster than anyone could react, a large, black scythe blade was around her neck.

"You're not possible!" He said, now standing behind her to her side, "Nothing can survive any amount of time of exposure to the Void's storm."

Just as fast though, was a cord of energy that shot from Valkyr's hand. It connected with the scythe and tore away from the owner's hands. It was flung away, spinning, and slid along the grey, polished floor.

"You're still too aggressive for your own good" Valkyr said, "You still don't take full account of the situation. If I was armed, then you would be dead." Luna turned quickly and did the equivalent of a Rhino's punch to her aggressor's chest with her magic. "And she can also defend herself with energies from another galaxy."

"You haven't changed as much as it seemed when I found you tigeress." He said, getting up to his feet.

Luna glanced at Valkyr questioningly. "My mastery of many weapons and combat tactics earned me the rank of 'Tiger' in the eyes of the Tenno." She crossed her arms, "I've always managed to stay at least one rank above him before Alad came." She said smugly.

"Enough of this; you're simply bragging now." He said, walking over to his scythe, "And you, Luna, she says you can defend yourself. Would you care for a... friendly duel?" He picked up the weapon, “You can defend yourself,” In a puff of smoke he appeared next to Luna, making her quickly step back and turn to him, “but are you really prepared for what this solar system has in store?”

“Valkyr is right, you do not assess your targets appropriately” Luna responded.

“Is that what you’ve taken to calling yourself?” He said to Valkyr, “Not a bad name, but I can’t see you as an ancient valkyrie.” He turned to Luna, “Now then, shall we?”

“I am ready.” Luna said confidently, bracing for anything her opponent could throw at her.

It all happened very quickly for Luna. She could barely deflect the volley of knives that were thrown at her, followed by a single arrow, then she stepped into the scythe to avoid the blade. The pole slammed into her back, and her knees bent under the force.

Not wanting that blade anywhere near her neck, she focused her magic and teleported away, into the shadows.

"It seems we are both in our element." Luna said from somewhere in the darkness. "You may thrive in the shadows, but I am the princess of the night; this will only be a matter of who sees the other first."

Valkyr had moved over to a wall to keep her bearings, and to try to keep track of where the two were. She is far more than what I expected. This darkness that invaded her kingdom must be powerful, cunning, or even both. As her eyes scanned for any sign of Luna, she saw a cloud of blue-purple energy. Oh, she is good.

Luna's opponent teleported up a pillar to search. Her saw the twinkle of a star, which he remembered was on her mane. Got you now. He teleported pillar to pillar to drop in behind her.

Then he landed in a cloud of energy that covered the floor, and Luna was nowhere to be found. What?! Where did you go?!

"I'm right here," he heard his own voice say, right before a pair of arms wrapped around his neck and pulled him to the ground, trying to choke him.

All Valkyr could see was a second set of red lights form from the cloud behind the original.

"Do you yield?" The second copy said.

The original responded by reaching for a knife and trying to turn. He stabbed at the second, and it dissipated into blue energy. More of said energy moved above him, and began to press down.

"I repeat, do you yield?" Luna's own voice rang out.

"I do." He choked out, and the pressure was releaved. He got to his feet and said, "we'll fought. I guess I did underestimate you." He sighed, "Now, on to business. You need a way through the Void?" Valkyr approached as the cloud formed back into Luna.

"That's right." She said.

"I can get you a key, but first, I need help with something."

"What could you possibly need help with?" Valkyr said, with a hint of sarcasm.

“Valkyr, how well do you think you know me?” He said.

“Fairly well”

“Where was I before coming to join the Tenno so many cycles ago…” He bowed his head solemnly.

“I… I don’t know. Where did you come from?”

“Does the name Low Guardians ring any bells?”

Valkyr gasped in realization. That’s where he’s from? He must have been there that day. They were all there, we made sure of it. But how is he alive? I thought none of the Guardians survived.

“What is it?” Luna said in confusion, “What is all of this about?

“The day the empire fell…” Valkyr choked out.

Author's Note

I posted a blog with a link for Grineer translations, but here it is again for those that missed it

The Stalker's Codex entry is what I'm using for back story on him, but keep in mind that this is just my interpretation of the past events.
The entry is on the Warframe wikia, so if you can't wait for the next chapter, you can go there to find it there.

Also, Happy Easter!