The Hand of Artakha was an organization of heroes dedicated to the will of Mata Nui and the pursuit of justice which predated the formation of organized Toa teams.[1, 2] Axonn, Hydraxon, and Shadow Stealer were members of the Hand. When their time passed, they were replaced by the Toa.
Artakha was neither the founder nor a member of the Hand of Artakha.
The Hand of Artakha was smaller than the Order of Mata Nui.
Unlike the Toa, members of the Hand of Artakha were more diversified in appearance, like the Order of Mata Nui and the Dark Hunters.
The majority of members in the Order of Mata Nui were once in the Hand of Artakha.
There was a time when the Hand of Artakha and Toa were active simultaneously. The Hand of Artakha was in service throughout the Matoran universe. The Hand of Artakha did not operate as publicly as the Toa.
Despite the name, there was no real reason for the Hand of Artakha to be active in Artakha.
The leader of the Hand of Artakha was someone not seen in the story (it was not Helryx or Artakha).