Shadow Kraata were the rare seventh stage of the Kraata. They were identified by their purple coloring as opposed to their shape, as they could appear in the shape of any of the previous six stages. Shadow Kraata could infect masks at long range.[4, 3]
This purple kraata had reached the ultimate stage of its evolution. Of all the kraata, only kraata of this type could infect masks from a distance. A firm grip could keep it from using its power.
A shadow kraata was colored purple and could infect Kanohi at will.
Shadow kraata were the most powerful of all Rahkshi kraata. They escaped from their stasis tubes and were spreading rapidly. These kraata were the rare seventh stage in kraata evolution. They had the power to infect Kanohi masks from a distance, making them a danger to all of Mata Nui.
Not all kraata evolved to the seventh stage. The ability to become a shadow kraata was a genetic mutation that only a very small percentage of kraata had.
Shadow kraata did not lose their original power upon transitioning to the seventh stage, although they all turned purple. Shadow kraata continued to have the power they had at earlier stages.[13, 14] There was no separate shape for the seventh stage; shadow kraata were identified by their coloring. Shadow kraata appeared in all six stage shapes, but all were level seven regardless of shape.
Shadow Kraata could infect a mask that was being worn.
It's possible a shadow kraata would not infect things if it wasn't being controlled by a Makuta.
Shadow kraata were very rarely ever used to make Rahkshi because doing so robbed them of their main asset: the ability to infect from a distance.