The completion stage is the second phase of the Vajrayana Buddhist sadhana, or practice texts, associated with the Anuttarayoga Tantra, which in Dzogchen correspond to the Inner Tantras: Mahayoga, Anuyoga and Ati Yoga. Although completion stage appears in the Anuttarayoga Tantra in general, it is especially associated with the Mother Tantras such as the Hevajra Tantra. Completion stage practices are therefore associated with the development of a Vajra Body, through practices that purify the movement of lung in the subtle body.