Yamantaka
Yamāntaka (Sanskrit: यमान्तक Yamāntaka; Tibetan: Shinjeshe, གཤིན་རྗེ་གཤེད་, རྡོ་རྗེ་འཇིགས་བྱེད།, Wylie: gshin rje gshed; rdo rje 'jigs byed; Japanese: 大威徳明王, Daïitokumyouou (abbr. Daïitoku); Chinese: 大威德金剛; pinyin: Dà wēidé jīngāng; Mongolian: Эрлэгийн Жаргагчи Erlig-jin Jarghagchi) is a Mahāyāna Buddhist iṣṭadevatā (tib. yidam) of the Highest Yoga Tantra class in Vajrayana, popular within the Geluk school of Tibetan Buddhism. Yamāntaka is seen as a wrathful manifestation of Mañjuśrī, the bodhisattva of wisdom, and in other contexts functions as a dharmapala, or 'Dharma-protector'.
Within Buddhism, "terminating death" is a quality of all buddhas as they have stopped the cycle of rebirth, samsara. Yamantaka, then, represents the goal of the Mahayana practitioner's journey to enlightenment, or the journey itself: in awakening, one adopts the practice of Yamāntaka – the practice of terminating death.
"Yamantaka" or "Shri Bhagavan Yamantaka" (श्री भगवान् यमान्तक; Glorious Lord Making an End of Yama*) is another name for Vajramahabhairava, who is the highest emanation of Bodhisattva Manjushri. Bodhisattva Manjushri, Shri Vajrabhairava and Shri Bhagavan Yamantaka together represent the Buddhadharmakaya (Body of Enlightened Doctrine) which is also called Vajradhara (Holder of the Thunderbolt) because it holds to the pledge of the thunderbolt (vajrasamaya) which is the pledge to carry out the action of the Buddha.
Read more about Yamantaka: How Does Yamāntaka Terminate Death?, Yamantaka in Japanese Buddhism, Etymology