Large Naga Morsarang, Batak Toba People, North Sumatra. Carved water buffalo horn. The naga morsarang, also known as sahan, is a container which is used to store magic ritual potions in the culture of Toba people of North Sumatra, Indonesia. Naga morsarang is one of several types of container in which the datu (Batak people's ritual specialist) kept a supernaturally powerful potion. Size: 13'' x 20'' x 2'' (33 x 51 x 5 cm).