Definitely terranidan

"Terranidan... where did I hear this before?" Gustav muttered.

Initially, they didn't expect much out of the countless scriptures across this cavern. There was too much stuff to ponder over, and both friends here were heavily under-informed.

They were clueless, but judging from a certain spike of excitement, it sounded like the crawler demons knew something drastic in comparison.

Anyway, regarding the previous question, one of the demons chanted. "Ship! Fly!" 

Their vocabulary has grown indefinitely, although not in equal volumes to their size. They were less fluent than a human toddler, but still helped prove a point.

"Of course..." Gustav thought, after pondering things over for about twenty seconds.

He was unwilling to give out any important information though, so he was mostly silent. Pre-medieval people wouldn't react so kindly on spaceships, and the context of whole planets simply because it sounded insane.

After all, it would be tiresome to explain everything, so he put all that energy to put some pieces of the puzzle together. "The terranidans were those aliens that healed me... but, what the hell are their fat-looking words doing down here?"

Arila noticed that her friend was thinking about something, because he didn't look as clueless this time around.

Gustav picked that glare up, as it was beyond piercing. Since he trusted this lady, and aimed to avoid any stronger suspicions, it sounded like a good idea to share a fraction of information.

"Remember those guys that attacked the village and wrecked Tunada's house?" He first asked.

Once the other nodded, he explained. "Those guys are basically the enemies of my friends, and want me dead too. But all these words here are written in a language, that my friends speak."

That didn't help make sense out of this situation, but at least they were getting somewhere. It was a chunk of information they could work with, but the whole truth was far from them, in fact Gustav had more questions than ever now.

Once he dealt with the lady friend, he crouched down to talk with the demonic moles. "Tell me what you're reading there, and then we'll talk about why you can read it in the first place."

"Terran, god..." One of them growled.

That didn't make sense whatsoever, but now was the best time to gather up more information.

They were quite chatty too, as another one later added. "Cave here many years, and now big. Five hundred!"

"Five hundred what... years? They wrote a date on the walls?" Gustav asked, as he tried to develop a theory.

Since they struggled to form a whole sentence, three of these creatures started speaking all at once. At first it didn't make much sense, but they were repetitive, and therefore shone light to another important aspect.

Abruptly, they added. "Yes! They learn terranidan five hundred years. Caves, home now but Terran is god!"

There were many other chunks of words across this cavern, but more than half of them didn't make any sense. A bunch of words sounded gibberish, and even though the demons could read through some of them, they didn't know how to provide a proper translation.

This was an entirely foreign language after all, so the vocabulary which these demons had was already impressive.

Gustav built a proper theory either way, his conclusions were right to begin with, and he was right to question if the inhabitants here, were demonic to begin with.

"Something happened to those crazy bastards that we killed, and it's not good." He said, and captured Arila's attention.

Sure he was oblivious in many topics, but he felt more alert nowadays. His brain could efficiently keep up with such shocking information.

"I'm no genius, but even monsters or demons shouldn't look like that. Something happened to them five hundred years ago, and I think a bunch of random people shape-shifted into those things." Gustav added.

Arila didn't want to believe that, but some solid pieces of the puzzle begged to differ.

She recalled the recent battle even, and decided to express her concern. "I hate to admit it, but you may be onto something with that. When you were knocked down earlier, I saw a face that couldn't be a monster."

"And it kinda disappeared, right?" He followed along.

A bit angirly, Arila exclaimed. "Yes, and then we saw a full on bloody monster! Could've sworn I saw a girl before that, long hair and all." 

With that piece of the puzzle added and greatly emphasized, they figured out half of what was wrong with this place. These 'monsters' could shape-shift as well, like most sub-intelligent life. 

Why they ended up in this shape was a mystery, and so was their endless, spiteful anger. Considering that these creatures knew the terranidan language, Gustav figured that the same race of aliens, punished a bunch of random people here in the past.

The event happened five-hundred years ago, and he hoped that they only punished humans rather than any other species. These 'monsters' knew an intensively foreign language, so he guessed that the terranidans were here for a very long time too!

"They fixed my gut easily... and were ready to rip them off my belly too. They have all those fangled tools, so who knows what they could do to their enemies? I Gotta be careful." Gustav thought, as they decided to cross this cavern now and sink deeper within the tunnels.

It was difficult to make sense out of the scriptures, or what those three statues represented, so it didn't seem worthwhile to hang around here for any longer.

Considering that they were a bit more informed now, the couple of friends felt slightly bad about the creatures they killed here. Some scriptures encouraged that their horrid anger wasn't voluntary. 

With that fact partially acknowledged, Gustav especially, wanted to avoid any future battle if the opportunity was given. He felt sad on behalf of these poor souls, as this kind of life was simply depressing.

Anyway, most of the group walked about ten meters away from the cavern by now, and followed yet another tunnel.

Little did they know though, one of these six demonic moles was left behind, in the room full of scriptures.

He was mesmerized by one of the many words of this place, and chanted. "Terruga... Terruga."

There was absolutely no context to this, and most passerbys would consider it random. It wasn't however, as this word masked great importance.

The cavern's walls suddenly started shaking, and the tunnels nearby suffered a similar magnitude!

A collapse didn't seem likely at the moment, but the fact that one word triggered such a response, reminded once more how weird this place was! 

Gustav was rattled again, and asked himself. "Are the crystals worth it..."