The Body of Conscious Will, related to the sephirah Tiphereth and the Human Soul.
In Hindu philosophy, it is called Anandamaya kosha (sheath / body of bliss).
"And finally, it will be necessary to create the Egoitoorasiana body or the body of Will of the Being, which is the Causal body." - Samael Aun Weor, Questions of Importance to Women