SakYan is the Hindu culture, it come to ancient Cambodia in the 1th(Nokor Phnom or Funan civilization) and it changed to ancient Khmer words (Khmer Sankrit and Pali), but SakYan really developed in the Khmer Empire(Angkor era- the 12th) because there are many wars at that time, the Khmer warriors need something to make them feeling stronger, safely,... So SakYan with the power of magics was famous during the Angkor era, and until now.