This prayer was composed by Pope Leo Xlll after he received a vision in which he saw the battle between the Church and satan:
St Michael the Archangel, defend us in our hour of need; Be our safeguard against the wickedness and snares of the devil. May God restrain Him, we humbly pray, and do Thou, O Prince of the Heavenly Host, by the power of God, cast satan into Hell, and with him all evil spirits who wander through the world, for the ruin of souls. Amen.
The following two prayers were given to the Church by St. Michael the Archangel.
My God, I believe, I adore, I hope, and I love You, I ask forgiveness for those who do not believe, nor adore, nor hope nor love you. Amen
Most Holy Trinity, Father, Son and Holy Ghost, I adore You profoundly, and I offer You the Most Precious Body, Blood, Soul and Divinity of Jesus Christ, Present in all the tabernacles of the world, in reparation for the outrages, sacrileges and indifferences by which He is offended, and be the infinite merits of His Most Sacred Heart and through the Immaculate Heart of Mary, I beg the conversion of poor sinners. Amen