What is "zhitro"

In Tibetan Buddhism and Bön, Zhitro is the name referring to a cycle or mandala of 100 peaceful (zhi) and wrathful (khro) tantric deities and of a genre of scriptures and associated tantric practices which focus on those deities which represent the purified elements of the body and mind. These hundred peaceful and wrathful deities are believed to manifest to a deceased person following the dissolution of the body and consciousness in the intermediate state, or bardo, between death and rebirth. The best-known, though by no means only, example of this genre of texts and practices is commonly known as the Kar-ling Zhitro cycle after Karma Lingpa, the tertön who (re)discovered or revealed this collection of texts. The text which is well known in the west as " Tibetan Book of the Dead" (though more properly called "The Great Liberation by Hearing in the Intermediate State") forms one section of Karma Lingpa's Zhitro cycle.