BIONICLE Legends 6: City of the Lost

City of the Lost is the sixth Bionicle Legends book and came out 2007.

Story
80,000 years ago, the six Barraki planned to confront the Great Spirit, Mata Nui. Each of them had armies that were all powerful. But before the Barraki could launch their onslaught, the Brotherhood of Makuta intervened. Their army, which consisted of Toa, Exo-Toa, Rahkshi, and Matoran, wiped out the Barraki's armies and the Barraki themselves were taken as prisoners. The six met Makuta, who wants to have them executed, but before he could do so, Botar intervened and taook the six to the underwater realm of the Pit.

When Reysa, an Onu-Matoran, was mysteriously killed near Mahri Nui's Fields of Air, Defilak, the Le-Matoran Mahri Nui Council Leader ordered a search to the Black Water to find out what was there. Kyrehx, a Ga-Matoran sentry, spotted a Kanohi mask, (unknowningly, the Kanohi Ignika, the Great Mask of Life).

When she went to show it to the council, she was attacked by alive air weeds near the Fields of Air near the Hydruka Pens. She was saved by Dekar, a Po-Matoran hunter. Kyrehx gave him the mask, and both of them went their seperate ways, not knowing that a squid of the Barraki Warlord Kalmah had spotted them with the mask.

Defilak; his friend Sarda, a Ta-Matoran; Gar, an Onu-Matoran; and Idris, a Ga-Matoran, travelled in Defilak's submarine down to the Black Water. They were then attacked from all sides from an organized swarm of Takea Sharks, led by a being named Pridak. After the sub was destroyed, Pridak interogated them, then took Defilak, his 'meal' to tell him a tale.

Meanwhile, Kyrehx and most of the other Matoran of Mahri Nui spotted thousands of Venom Eels heading towards the city and began to attack. But before Kyrehx could launch the attack, she was taken by Carapar to Takadox. Takadox hypnotises the Ga-Matoran and forces her to tell him where the Ignika is.

When Takadox hears that Kyrehx doesn't have the mask, he tells Carapar to go and tell Ehlek to stop commanding his Venom Eeels to destroy the city, in case the mask is still inside the city. Dekar then finds out that the Kanohi mask he possesess is the Kanohi Ignika, Mask of Life, and realizes that it will keep healing any nearby attackers, he then decides he is going to destroy it.

Pridak tells Defilak about the League of Six Kingdoms, his and his fellow Barraki's once known armies. Kalmah and Mantax then find out that Dekar has the Ignika and begin to chase him whilst he attempts to destroy it in a nearby cave which causes the Ignika to create a guardian, a 300 foot-long Venom Eel. Carapar manages to force Ehlek to stop launching attacks on Mahri Nui in case the mask is still there.

The two then meet Brutaka, a fallen Order of Mata Nui member who then commands that they take him to the Ignika or perish. Kalmah, Mantax and Pridak begin to fight the 300 foot-long Venom Eel which has destroyed part of Mahri Nui's upward pointing stone cord, and the Barraki are repeatedly being defeated but they are not going down.

Then, Brutaka, Ehlek and Carapar arrive. Ehlek and Carapar are hoping that Brutaka will rid them of their leader but Pridak suspects this and Brutaka does not. Brutaka then sees Dekar with the Mask of Life and goes over, claiming that he is an Order of Mata Nui member and Dekar needs to give the mask to him.

Dekar refuses, saying 'If you were meant to have the mask, you would have found it first, wouldn't you?, Pridak, finally annoyed, commands Kalmah's giant squid to drag Brutaka off to the Black Water.

Then, as Pridak corners Dekar and takes the Ignika, it sets off a bright light, which begins to envelop the whole of Mahri Nui.

Characters

 * Barraki - Kalmah, Pridak, Takadox, Carapar, Mantax, Ehlek
 * Brutaka
 * Matoran - Defilak, Dekar, Sarda, Reysa, Kyrehx, Gar, Idris
 * Hydruka - Morak, Thulox
 * Venom Eel

Quotes

 * Pridak stood on the tower of his island fortress, looking down at his assembled army. His troops came from an endless number of places. Some were Matoran criminals, others ex-Dark Hunters seeking refuge from their former employer, and by far the majority were simply beings who did no long welcome in their homelands. They were thieves, murderers, traitors, and liars, and easily the most beautiful sight he had ever seen.