kavoo is an insanley strong skakdi. normaly 2 skakdi are needed to use elements but kavoo is an eception. after makuta spirah came and left zakzan, he escaped with 5 others (one of them rastic) only he and rastic made it to omega nui (order of mata nui headquarters). he became a toa by hunting down a brootherhood of makuta spy. he is the only known toa of darkness to join the order of mata nui.
mask and tools:
as a skakdi he has no mask. but does have a buzz saw shield and power sword specialized for darkness energy.