Tantra Buddhism first appeared in India about the same time as Hindu Tantra, about the 6th century, and flourished until about the 11th century.
In the Tantric tradition, deities are not spirits to be worshiped, but instead represent the yogi's own inner nature. Sometimes called Deity yoga, Tantric
Buddhism provides a path to enlightenment through identity with Tantric deities. With the guidance of a guru, the yogi uses rituals,
meditation, visualization through mandalas and other practices to
realize him/herself as a deity and, therefore, as enlightenment manifested.
At this level, dualities do not exist and the yogi discovers that
what appears to be opposite principles are, in fact, one.