Bon Yidams (meditation or tutelary deities) are those deities which are often used in meditative tantric practice and are the mainly fierce or wrathful forms. These class of deities resemble Buddhist yidams like Chakrasamvara and Hevajra. It includes figures like Magyu Sangchog Tartug ('Supreme Secret of Mother Tantras, Attaining the Limit'), Trowo Tsochog Khagying ('Wrathful One, Supreme Lord Towering in the Sky'), Welse Ngampa ('Fierce Piercing Deity'), and Meri ('Mountain of Fire').Kvaerne 1996, pp. 74–86. The Bonpos also have a tantric tradition of a deity called Purpa, which is very similar to the Nyingma deity Vajrakilaya.
