What Lies Behind the Wall?

What lies behind the wall? is a short story, written by User:Abc8920, that tells Mulon's mission to the Matoran Universe 1,000 years before the events of Shadow Play. It will be posted in 4-5 parts, depending on the length of the final events.

Part 1
The street lights had just started to shine, five minutes after Solis Magna had given its last ray of light to the city of Roxtus, capital of the ever growing Skrall Empire.

And even though most of the city still worked at night, the residential zone where Toa Mulon was walking through was silent and still. He sat in a bench, and stared at his reflection on the polished metal surface of the building in front of him.

The image of his reflection would have been different long time ago. He had long and muscular legs, well-built arms and a chest plate ornamented with Hordika-themed details. All his armour was black, including his great Matatu with a scope built in it, except for the chest and shoulder armour, which was white… the only remains of what he once was, a Toa of Light.

He remembered of his times in which he served the light. He remembered how his world of brave heroes was burnt down.

Millennia after the Great Cataclysm, everything seemed to go back to its place, with the Toa Nuva starting their vital task. But they were killed in Voya Nui. Another Toa team was sent, but they couldn’t prevent what happened next. As Teridax was killed by the Toa Metru beforehand, Mutran took the lead and possessed Mata Nui’s body, which turned out to be the universe in which Mulon and every of his friends and enemies lived.

Then everything was chaotic… and the result was that only he and a few Av-Matoran were sent to a distant world of Bara Magna by Brutaka, just before the Universe crumbled to pieces.

But Rotam, the last Makuta alive, followed them, and took over the Rock Tribe. Soon, he marched towards Atero, the last stand of the Agori and Glatorian, and crushed them. By that time Mulon had become a Toa of Light, but he had been badly wounded and captured.

Rotam healed him, showed him the ways of the truth and darkness, and he expulsed his inner light. Mulon soon became the second in command of the empire that Rotam started to build, and that after five thousand years still hadn’t stopped conquering.

Suddenly, Mulon’s thoughts were interrupted as a presence invaded his mind. It was Makuta Rotam.

 “How can I serve you lord Rotam?” 

'' “Come to the Throne Room as soon as possible. There is an important matter to discuss.” ''

“I am going there immediately, my Lord.

As Mulon felt the presence out of his head now, he cursed. Someday, he should take some training and learn how to blind his mind from those intrusions, he could not stand them.

He switched to his Kanohi of Quick Travel, and disappeared from sight.



Rotam, while sitting in his throne, watched Mulon appear. However, the truth was that he could not see the Toa with his eyes, for the Room was always cast in an eternal darkness. But having extensively trained mental powers, he didn’t need them.

The Toa of Shadows bowed, and Rotam pressed a button on the arm of his throne. The black crystal roof of the room slid aside to reveal the always impressing vision of the night sky.

The Emperor was very proud of some decisions he had taken after the war. The surviving Matoran had all been executed. Matoro had been left for dead after falling in the Creep Canyon. All had been killed except Mulon. Transformed into Toa shortly before the war… it could have been easy to just kill him, and it would have made sense, for nothing good could come out of a Toa of Light.

But instead, he had decided to try out something not exempt of risk – try to convert him to the shadows. It had not been an easy process, for if it was done too quickly, the light drain could consume the Toa’s sanity. But Rotam he had had patience, and had insisted in the vile creatures that the Glatorian and the Agori were, how they had betrayed him, how they had planned his death.

That part didn’t have as much difficulty as the others, since an infected Glatorian he had infiltrated had stabbed Mulon in the back. When Mulon was ready, he had given him the Shadow Leech, and just to assure complete loyalty, put some Kraata Virus in his Kanohi, the exact quantity to subtly influence his acts.

And five thousand years later, he still did not regret what his decision. The elimination of the Bone Hunters out of the face of Bara Magna, the submission of the Sisters of the Skrall to the Empire, the conquest of Bota Magna, and other important milestones in the road to universal domination had been achieved by Mulon.

“Mulon, can you see the moon of Aqua Magna?”

“Yes, lord Rotam. It is the blue moon on the east. This night we have an exceptional view of the two moons.”

“Indeed, Toa. But, don’t you see anything strange?”

Mulon adjusted the lens of his Matatu to the sky, and zoomed to Aqua Magna. He scanned the blue surface of the moon, but couldn’t see anything out of ordinary. But as he zoomed out and turned his face to Rotam, he quickly zoomed back to Aqua Magna. Barely noticeable, there was something black which obscured a small part of the moon’s southern pole.

“What could be causing that shadow, Emperor?”

“The Matoran Universe, Mulon. I know we have not talked about it for a very long time about it. But you know the problems we currently are having.”

“I know, my lord. The Shadow Toa are excellent at enforcing your law, but they do not work well as soldiers.”

“Bara Magna is possibly the planet with more Shadow Toa, for the many factories that have to be overlooked. We have conquered all the six planets of our system, settled many cities with Skrall population and Shadow Toa squads. But, as the Second in Command you know our poor military advances in the rest of the Galaxy. Do you remember my project, right?”

“Yes, my lord. Outside the Solis Magna system, obliterate any planet habitable, take its resources, and settle a small city of Skrall and Shadow Toa. When the resources of one sector of the Galaxy run out, another will provide Bara Magna of its needs.”

“But we need something better than Shadow Toa for the Universal conquest. Do you remember your time in our old world? There the Brotherhood had the best type of warriors in the Universe. I need Rahkshi.”

A shiver went down Mulon’s spine as he heard of those creatures. They had been the terror of the Matoran Universe, exoskeletons for slugs of destruction; they had ravaged many lands, including his own.

“The problem is, Mulon, that I need Energized Protodermis. And here is where the pile of ruins that the Great Spirit Robot is plays an important part.”

Mulon looked at Rotam in surprise.

“Do you want me to retrieve the energized Protodermis from there, Emperor?”

“There are pools of energized Protodermis both in Daxia and Destral. Take it to me… and I suppose that with those quantities will be enough to create another Entity.”

The Toa of Shadows nodded, trying not to show his emotions. If you worked for Rotam you should not show them.

“As you wish, Emperor. I will prepare my private spaceship and leave before dawn.”

Mulon bowed again, and left the room. The Emperor then closed the crystal roof, and his room once more was cloaked in darkness.



The spaceship was ready. It was small, its capacity being only of one passenger, and its shape resembled that of a Takea Shark. In fact, Mulon’s spaceship could be said that it was the only one of its kind; the spaceship – which Mulon had named Pridak – had been built and designed for him as a gift from the viceroy of a nearby planet.

Mulon boarded the Pridak, and closed the door behind him. The spaceship only had three rooms: the control room, a small cargo one and the decompression room with a hatch.

He still wasn’t sure of how to enter the robot… if it hadn’t been because Rotam had told him, he would still think that it was bellow the surface of the endless ocean of Aqua Magna.

But that was the least of his worries at the moment, and he decided to have some sleep. He just put on the automatic pilot and activated to opacity configuration of the protodermic windows.



The Toa of Shadows suddenly awoke alerted by the Pridak’s sensors, which were beeping. He turned on the lights of the Pridak, and looked at the screen in front of his chair. The matter detectors had sensed a satellite orbiting around Aqua Magna, and he was now heading straight to it.

He changed the configuration of the Pridak’s windows, so he saw what the satellite really was. Mulon held his breath as he watched the twelve million meters long, humanoid looking robot silently orbiting around the blue moon. Rotam had once told him that his universe really was a robot, but he had never imagined like that.

The metallic skin of the robot was scratched, broken in some places, and meteor holes could be seen from the distance where the Pridak was. Mulon could get through one of those. He just had to reach a hole near Karzahni and get through it. The only inconvenient was that he would have to drive manually through the hole, as the teleportation power couldn’t get through the thick, metallic skin of the Matoran Universe.

A smile appeared in Mulon’s face through his great Matatu as he though about the teleportation system. Only five hundred years after he had seen the truth, he had invented what could possibly be the Empire’s most successful technology after the disintegrator gun.

Mulon opened a hatch bellow his chair and descended to the small compartment below. And he admired the monstrosity that powered the ship.

Not having any energized protodermis, Rotam found no use for the Kraata except for producing Kraata Virus, which he used to infect the insurgent workers of the factories. But then, Mulon was conceded access to the few things that the Emperor had taken with him before the destruction of the Matoran Universe – some Kanohi, a black lightstone, a pair of swords, a reconstruction at random Kanoka and a sample of Visorak Venom. And then he had the idea.

A Teleportation Kraata, when mutated with Visorak Venom, grew ten times bigger than normal, its skin irradiated green light and energy, and its power was greatly augmented.

So Mulon checked the Kraata Hordika in front of him, green light bathing his armour. Many wires were connected to the creature, and the Toa of Shadows grabbed a particular one, and plugged it in a hole in the back of his head. Immediately, the Kraata Hordika received the instructions of where to go, and Mulon quickly unplugged the wire from his head and returned to the control room.



The Pridak materialized in front of a fissure in the Matoran Universe Robot’s armour. Mulon deactivated the automatic pilot, and levellers and a steering wheel deployed from the walls that surrounded him. Carefully and slowly, Mulon drove towards the fissure. He continued advancing, until he was only a few kio from the entrance. From there, it looked like he was about to enter a sinisterly grinning mouth. He sped up, but slowed down once he was entering the fissure.

Mulon felt strangely uncomfortable as he continued penetrating the robot’s armour. The front lights of the Pridak were allowing him to illuminate the narrow walls that enclosed him. The situation was very tense, and as minutes passed by he just saw the seemly unending walls of scarred metal. Where was he getting? When he had entered, he had clear that he had to go down, but in the monotony of the tunnels he had lost track of the direction he was following.

Finally, he saw that the Pridak abandoned the fissure, and then shadow enveloped everything. The front lights didn’t get enough far to illuminate anything. The radar just showed the metallic wall behind him; there was no information on what could lay below him.

He could just go down blindly and hope to find some reference to orientate him.

For the next two hours, he kept advancing through the darkness. By then he at least knew what direction to take to find ground – he had been launching some light emitting spheres, and one of them had illuminated something metallic.

He now was just a kio from the source of the reflection. As he zoomed closer to it, he slowly saw the outline of it; it was the roof of some kind of large building, like a fortress. Given the northern position of it, it could only be Karzahni’s palace. That meant that Mulon still had to get through the coastal gates in order to arrive to Metru Nui.

Mulon then stopped the Pridak. He would have enjoyed seeing ravaged land of Karzahni, with its Matoran statues, its broken factories and Manas nests, but he had a mission to accomplish for the Emperor. So he went to the Kraata Hordika compartment, to set the destination to the City of Legends.