Stories are great, even better when you already know the context and have a general idea of what the storyteller is talking about. The only thing Luna remotely understood was mention of "space magic", and even that was...loose.
The two were seated on either side of an oaken table, within one of The Guardian's nicer memories. They were inside the tower of an old church, somewhere in a territory known as the "European Dead Zone". Luna shivered at the name. The Guardian had been talking for the better part of over an hour by now, only ever stopping to answer a question or two, and those tangents usually became in-depth explanations on their own. He was trying to keep things as simple as he could: explaining the Hive, explaining the Light and the Dark, and explaining Humanity. She had only asked about the situation on the Moon, and he really didn't want to overshare. Not yet, at least.
"So, to summarize..." Luna began, sounding skeptical.
"Uh-huh," Guardian murmured, nodding attentively.
"A genocidal species of bipedal crustaceans splits it's power-"
"Yep."
"The most powerful of the three monarchs at the time sends his spawn to end the Traveler-"
"Right."
"And upon arrival, said spawn, Crota, is repeatedly delayed in his conquests, but never truly defeated, over the course of centuries-"
"Mmmhm."
"And you just...walked in and killed him and all of his highest, most powerful servants? One by one?"
"...More or less."
"And then fought your way into his personal dimension, slew him on his throne with his own sword, when he'd no doubt be most powerful..?"
"Yep again."
"And later, did the same to his vengeful, more powerful father?"
"I had a little more help that time, but yeah. Pretty much."
"And then, years later, ended the rest of them?"
"Most of THAT time was a bit of a blur, but yes, others and myself brought them low."
Luna cocked a brow. "I'm finding all of this a little hard to believe. Would you mind shedding a little more light on all of this?" she asked. She was concerned that this "Guardian" was either the most self-deceived liar in all of Equestria's history, or the most potentially dangerous truth-teller to ever walk on pony soil.
The Guardian merely shrugged and sighed, a wince on his face. He really didn't want to subject her to more of his past so directly, especially on purpose. It made him uncomfortable, putting someone else through exactly what he went through, even if it wasn't actually happening to her. "Do you honestly want to see more of what you've already seen, but worse?"
His tone was sincere. Almost pained. Luna considered this. She had almost forgotten that little nugget of absolute hell she was witness to not long ago. "Your point is fair, I'll take you at your word. And, if you are to be considered capable of such things, I'd like for you to meet with myself and the other princesses of Equestria. It is not uncommon for beings of great destructive magnitude to pass through this realm, and we hardly ever have the chance to resolve situations calmly and civilly right from the start. It would mean much to myself, as well as everypony else privy to your arrival, if you were to return to the mountain you fell from. The last thing any of us need is a misunderstanding."
The Guardian thought for a moment, his eyes drifting as he set his forehooves on the table and rested his head between them. He found it to be rather cozy, wondering what other comfortable positions this new body had to offer. He'd have to explore later, though, there was a choice-that-isn't-really-a-choice to be made! Might as well make it as nice as possible.
"Can we meet over tea?" he asked, a sheepish smile having slipped up his face. Luna merely bowed her head in affirmation.
"That can be arranged quite easily. I prefer coffee myself, but my elder sister enjoys the leafy variant of boiled water almost as much as I the beaned."
They laughed. Things seemed to be going well.