Disclaimer: I don't own Bionicle but I do own the custom Toa Nuva in this fic.
Chapter 1: Their Back
It was a beautiful day on the island of Mata Nui as the Matoran were preparing for their voyage to Metru Nui. All the villagers were currently staying in Ga-Koro to build the boats for the trip. Everyone was enjoying the preparation, well except for Pohatu.
"Onua, why I am I helping with this again", asked the Toa Nuva of Stone.
"Because I need you to brace the walls with stone so there's no chance of a cave in."
Onua and Pohatu were busying digging a tunnel to the underground dome where Metru Nui and the Protodermis Sea were located. They had been working for about two weeks and were almost done, but something was about to go horribly wrong. All of a sudden a strange sound could be heard from behind the earth and stone,"Chikt-chikt-chikt".
"Brother, did you hear that?" asked Pohatu," it sounded like Bohrok."
"The work must be getting to you, we both know that as long as the Bahrag are trapped the Bohrok remain sleeping", said Onua.
But just as Onua said that, "Boom!"
A swarm of Nuhvok burst out where Onua was digging startling both Toa
"Aaaahh!" they yelled in unison.
"This can't be", said Onua.
"We can't fight them in this tunnel without causing a cave in", said Pohatu, "we have to retreat and tell the others"
"I agree brother."
Onua put on is terrain tracks and Pohatu activated the Kakama Nuva, and they left the cave as fast as possible.
The two Toa arrived at Ga-Koro to inform the other five Toa. After they completed their explanation to the others they traveled to the chamber where they had last seen the Bahrag, only to discover a truly horrible sight. The Bahrags' prison had been broken into and the two Queens lay on the floor, ripped to pieces, leaking out silver blood.
"Who could have done this?" asked Takanuva.
"I don't want to ever wayfind whatever did this," said Lewa.
"We must see if the Turaga know anything about this," said Tahu.
When the Toa returned to Ga-Koro they told the Turaga what they had discovered Vakama began to speak.
"The prophecies say that when a great darkness returns only all the Toa will be able to defeat it," said Vakama.
"Then we must find and defeat this new evil as soon as possible," said Kopaka.
"No Toa of Ice," said Vakama "for three more Toa are on their way to Mata Nui."