Bajra Yogini is the eldest of a ferocious foursome of tantric goddesses specially venerated in the Kathmandu Valley. To Buddhist Newars – her main devotees – she is identified with Ugratara, the wrathful, corpse-trampling emanation of Tara, one of the female aspects of Buddhahood. Hindus identify her as Durga (Kali), the most terrifying of the eight mother goddesses. She’s also known as Khadga Yogini, for the sword (khadga) held in her right hand.