Krana Bo-Kal was one of the eight Krana-Kal, carried by the Bohrok-Kal. They were the visionary Krana, with the ability to see in the dark and tunnel through anything except the tunnels underneath Mata Nui. They, like the other seven Krana-Kal, could act on their own, communicate using telepathy, and create a shield around their Bohrok-Kal, but only when they were about to complete their mission. Bo-Kal could be created by using the substance that mutated the Bohrok-Kal on a Krana Bo.