In the Completion Stage, one meditates on ultimate reality based on the image that has been generated. Completion Stage practices also include techniques such as "tummo" and "phowa". These are said to work with subtle body elements, like the energy channels ("nadi"), vital essences ("bindu"), "vital winds" ("vayu"), and chakras. The subtle body energies are seen as influencing consciousness in powerful ways, and are thus used in order to generate the 'great bliss' ("maha-sukha") which is used to attain the luminous nature of the mind and realization of the empty and illusory nature of all phenomena ("the illusory body"), which leads to enlightenment.