The First stage of the Undying God's Physique allowed its user to heal any wounds on his body in a matter of seconds, so long as the user had Qi in his body.
The Second stage of the Undying God's Physique allowed its user to heal any major wounds, be it amputation, decapitation, or even crippling, so long as there was Qi in his body.
The Third Stage of the Undying God's Physique allowed its user to heal their entire body so long as the soul survived in some form.
There were in total Four stages to the Undying God's Physique.
Alex felt a sudden feeling of ascension as his Dantian fully healed and he returned to the state of a cultivator once again. The excess Qi in his body finally moved back to his Dantian, and he felt it being affected by the Yang Source and Yin bead inside of his Dantian.
They had laid dormant in him when all Qi had left him.
