ཕག་མོ་གནག་སྣུམ་གྲི་ཐོད་ཅན༔
Shiny black in colour and holding a hooked knife and skull-cup.
Longchen Nyingtik, Yumka Dechen Gyalmo, Empowerment, Rinchen Terdzö, Tibetan Masters, Jamgön Kongtrul Lodrö Thaye