Chhaya Purush, in plain English means the Human Shadow, which in the context of this article means the Shadow of the practitioner of the Mantra Experiment. This experiment seeks to bring to life the Shadow and control it, to get it, to make a dream or desire come true. This can also be said to be a kind of Vashikaran Experiment to bring to life and control the Shadow.
The Mantra Sadhana has to be performed at night, after having a bath and wearing clean clothes. The practitioner should sit down comfortably, facing the north direction and keep a Ghee Diya in front of him, in such manner that the practitioner will be able to visualize his own shadow being reflected by the light of the Ghee Diya.
Then, the practitioner should continuously keep chanting the Chhaya Purush Mantra given below 2500 times. The Mantra should be chanted while looking at the Shadow all the time.
This Mantra Sadhana has to be performed in the same manner for 40 days. As the days go by, the practitioner will see the Shadow growing larger and larger.
On day number 40, the Shadow will manifest as the Chhaya Purush, before the practitioner, the practitioner should not get frightened and keep his calm and ask the Chhaya Purush to fulfill his desire.
Then, lastly, the practitioner should take a promise from the Chhaya Purush that he will manifest, whenever the practitioner desires and fulfill his wishes.
The specific days for performing the Mantra Experiment and other details like Mala and Aasan are not mentioned, hence it appears that these details have a low importance.
आगम निगम की खबर लगाये सोऽहं पारब्रह्म को नमस्कार ||
Aagam Nigam Ki Khabar Lagaye Soham Paarbrahma Ko Namashar ||
Similar Mantras can be seen here -
Islamic Chhaya Siddhi Mantra
Hamzad Vashikaran Prayog