A toli is a round, ritual mirror used in Shamanism in some parts of Mongolia and in the Republic of Buryatia. The mirror, ornamented on one side and polished on the other, may be made of bronze, brass or copper. Toli are traditionally worn as part of a shaman's attire around the shaman's neck, or in quantity on the shaman's kaftan or apron - often called their armour as these pieces of ritual clothing help to protect the shaman from hostile spirit attack. Toli help ward off harmful or attacking spirits in their own right, and also can be thought of as an object which signifies the shaman's authority or role. Toils have additional purposes as well, for example, amongst the Daur people and all the other shamanistic groups who use them, they are used for a variety of practices, including to purifying and empowering water or vodka, collecting and trapping hostile spirits, and providing a home for helper spirits. They also act as vessels for spiritual power - called 'wind horse' in Mongolia - which is the shaman's power. They can also collect and store the power of blessings, or power given from the sun, moon, stars or other parts of Creation, all of which can be given to a sick person, or which can be added to the shaman's own power. Walther Heissig, describing shamans and their incantations in Hure Banner in the 1940s, remarks that one shamaness indicated that the toli contained "the white horses of the shamans"; the mirror itself was seen as a vehicle for the shamans. Toli may be used in different sizes; among the Daur, the front and back of the shaman's costume was covered with small toli placed like overlapping scales while the front might also feature eight large mirrors and one medium-sized mirror to protect the heart, the neker-toli; according to Heissig, in Hure Banner shamans wore nine mirrors, nine being a particularly meaningful number in Mongolian religion and mythology. The neker-toli might be plated in nickel. The number of toli collected by the Daur shaman was an indicator of his or her level of power.