Then, suddenly, his mind was somewhere else.  He could see day being consumed by nigh, Metru Nui collapsing into ruin, then miraculously restored.  Six Kanoka disks flew at him from out of the darkness, forcing him to duck and dodge.  They shot past him, then hovered in the air and unleased their power on the Morbuzakh plant.  Before their energies, the plant withered and died.  Their task done, the Great Disks merged together to form a single one of immense power, and...

The vision was gone.  But the chill inside Vakama told him it had not just been an idle daydream.

...
...

But the Toa of Fire was not listening.  In his mind's eye, he saw six Matoran, each with  Great Disk.  He knew their names but could not see their faces.  Worse, the shadows behind them were alive with danger.  Vakama could see a pair of fierce red eyes hovering in the darkness and a four-legged creature stalking the Matoran.  HE had seen that figure before, in real life, struggling with Toa Lhikan.  Vakama knew how powerful and evil this being was, and the memory made him shudder.

"Nuhrii...Orkham...Vhisola...Ahkmou...Ehyre...Tehutti," Vakama muttered.  "They can decipher the riddles.  They can help us find the Great Disks.  But beware of a dark hunter who walks on four legs.

~Greg Farshtey, Mystery of Metru Nui, pg 13 - 14, 15