The Syrax Stone was an ancient artifact with incredibly power, allowing the holder to become a being more powerful than even the Great Spirit. It was used by Mesograk to achieve his ultimate goal.
The Syrax Stone was a powerful, ancient artifact created by the Great Being, Baxitus. The Stone was later found by Vezon who then passed it onto Mesograk so he could become a Great Spirit himself, except even more powerful. It was absorbed into Mesograk when he became Mesodax.