Hinduism-Buddhism developed by King Adityawarman and two generations before him is known as Wajrayana, part of Mahayana Buddhism known for the rituals in which worshippers dance over a pile of bones, drinking animal blood into senselessness.

Bambang Budi Utomo, archeologist from the National Archeological Research and Development Center studying Wajrayana in Sumatra, displayed pictures of relief carved on a statue of Adityawarman standing over a