Trunyan is notable for its peculiar treatment of dead bodies, in which they are placed openly on the ground, simply covered with cloth and bamboo canopies, and left to decompose.
Unlike the lowland Balinese, Bali Aga people practice ancient rituals that predate the arrival of Hinduism or Buddhism.
[4] Another example of outside influence on the Trunyanese is the requirement for young men to travel through lowland Bali for some time to live as beggars.
Many married couples with children in Trunyan perpetually postpone their wedding ceremonies just because of the high costs involved.
Instead of cremations, the funeral rite for dead bodies in Trunyanese society is for them to be simply laid on the ground, covered by cloth and a bamboo cage, and left to decompose.
The giant statue is housed in an underground chamber and is still regularly cleansed with rainwater, bedecked with flowers and anointed with special oil.
The manner of worship is based on an ancient bronze tablet from 911 AD which was found in the Pura Tegeh Koripan, a temple built in the form of a neolithic pyramid at Mount Penulisan, the second-highest point of the caldera of the Batur volcano.
[1][5] The effigy of Bhatara Da Tonta is brought out once a year during the Brutuk festival, which is held on the full moon of the fourth month (Purnamaning Sasih Kapat), which falls around October on the Gregorian Calendar.
Brutuk dance performers wear sacred masks and two aprons of dried banana leaf fiber, tied around the neck, waist, and torso.