According to Bell, "the cult of Pehar at Nechung Monastery experienced a meteoric rise in popularity in the seventeenth century primarily through the deliberate efforts of the Fifth Dalai Lama and his regent Sangyé Gyatso.[3] After the fall of the Western Xia, the influx of Tangut refugees into Tibet led to the adoption of the Pehar deity into Tibetan Buddhism."[1] The rite of the Oracle possessing the kuten is ancient, entering the tradition from the Bonpo and Ngagpa, and traditionally involves a detailed evocative liturgy including such elements as fanfare, dance, mudra and mantra to invoke the Oracle who forcefully projects their mindstream via the discipline of phowa, temporarily possessing the physical basis."[1] Pearlman describes the ritual investiture of the Nechung Oracle that is constituted by sacred symbols and iconography in the colours of the Five Pure Lights and Mahabhuta and includes lungta, bija and dhvaja:"On formal occasions, the Kuten is dressed in an elaborate costume consisting of several layers of clothing topped by a highly ornate robe of golden silk brocade, which is covered with ancient designs in red and blue and green and yellow [colors traditionally subscribed to the Mahabhuta].On his chest he wears a circular mirror which is surrounded by clusters of turquoise and amethyst, its polished steel flashing with the Sanskrit mantra corresponding to Dorje Drakden.