The novena to Angel Michael is a very powerful against evil powers. The novena to Angel Michael is a catholic prayer used officially for spiritual warfare. It is always accompanied with a lot of experiences and testimonies.
The prayer to Angel Michael was used by Pope Leo XIII since 1884, when he was praying for the defense of the Holy See. Many priests and exorcists use the prayer during exorcism and deliverance sessions.
A lot of testimonies have been associated with the Prayer especially if said with the holy mass. You can download the documents for the prayer below.