Hydraxon

Hydraxon, the powerful jailer of The Pit, Hydraxon, is a weapons master. Armed with explosive boomerangs, wrist knives, Cordak revolving blaster, and protected by thick armor, he is ready to join the Toa Mahri in their fight against the Barraki.

* this image may be a prototype,and may not really be what he looks like.