Stone of Legends

The Stone of Legends is a priceless artiface considered the ultimate prize by crooks, villians, and theives. The stone itself is said to contain all the information in the universe. When a new chronicle or being comes into existence, the stone adds another small peice to it. It's only about as big as a normal rock, but it has this much information.

History
The stone was first made by the Great Beings as something to chronicle all their work. In the end, they made a stone that would carry all information on the beings, Kanohi, weapons, planets, and objects in the universe.

After it's creation, it was hidden in the Matoran Universe on the most barren area they could think of inside it: Stelt. After it's hiding, the Great Beings created everything in the Matoran Universe, and Mata Nui left on his mission, collecting information which was stored in the stone. Later, it had found other areas and things to record and did so until finally it had stored everything. When it was created, it was only the size of a pebble and had stored plenty, and at this point, it had stored everything and it was still only the size of a normal rock

After Teridax died, the stone was moved out of the Matoran Universe and was hidden on Spherus Magna inside another temple. It was later found by Metrados, who attempted to steal all the information in the universe. A group of Toa later arrived to retrieve the stone, and took it back to the temple. It now remains there, where it continues to search the universe for more information.