Fierce deities
Mahakala statue, holding a flaying knife (kartika) and skullcup (kapala)
In Buddhism, fierce deities are the fierce, wrathful or forceful (Tibetan: trowo, Sanskrit: krodha) forms of enlightened Buddhas, Bodhisattvas or Devas (divine beings). Because of their power to destroy the obstacles to enlightenment, they are also termed krodha-vighnantaka, "fierce destroyers of obstacles". Fierce deities are a notable feature of the iconography of Mahayana and Vajrayana Buddhism. These types of deities first appeared in India during the late 6th century with its main source being the Yaksha imagery and became a central feature of Indian Tantric Buddhism by the late 10th or early 11th century.
In non-Tantric traditions of Mahayana Buddhism, these beings are protector deities who destroy obstacles to the Buddhas and the Dharma, act as guardians against demons and gather together sentient beings to listen to the teachings of the Buddhas. In Tantric Buddhism, they are considered to be fierce and terrifying forms of Buddhas and Bodhisattvas themselves. Enlightened beings may take on these forms in order to protect and aid confused sentient beings. They also represent the energy and power that is needed in order to transform negative mental factors into wisdom and compassion. They represent the power and compassion of enlightened activity which uses multiple skillful means (upaya) to guide sentient beings as well as the transformative element of tantra which uses negative emotions as part of the path. According to Chogyam Trungpa, "wrathful yidams work more directly and forcefully with passion, aggression, and delusion - conquering and trampling them on the spot."
In Tantric Buddhist art, fierce deities are presented as terrifying, demonic looking beings adorned with human skulls and other ornaments associated with the charnel ground, as well as being often depicted with sexually suggestive attributes. According to Rob Linrothe, the sensual and fierce imagery represents "poison as its own antidote, harnessed obstacles as the liberating force" and notes that they are "metaphors for the internal yogic processes to gain enlightenment"
Tantric Deities
Yidams
In Indo-Tibetan Vajrayana, Yidams are divine forms of Buddhas and Bodhisattvas. The tantric practitioner is initiated into the mandala of a particular chosen deity (Sanskrit: Iṣṭa-devatā) and practices complex sadhanas (meditations) on the deity for the purpose of personal transformation.[9] This Deity Yoga practice is central to tantric forms of Buddhism such as Tibetan Buddhism. Yidams can be peaceful, fierce and "semi-fierce" (having both fierce and peaceful aspects). Fierce deities can be divided into male and female categories. The Herukas (Tb. khrag 'thung, lit. "blood drinker") are enlightened masculine beings who adopt fierce forms to express their detachment from the world of ignorance, such as Yamantaka, Cakrasamvara, Mahākāla, or Vajrakilaya. Dakinis (Tb. khandroma, "sky-goer") are their feminine counterparts, sometimes depicted with a heruka and sometimes as independent deities. The most prevalent wrathful dakinis are Vajrayogini and Vajravārāhī.
see also:Wrathful
