St. Michael is an Archangel. Not only is he an angel of high rank, but he also led the army of angels who fought and eventually threw Satan and the rebellious angels into Hell (see Revelation 12:7–9). This makes him the perfect person to call on when you need protection from the
Prayer to St. Michael
Here is the St. Michael prayer against evil:
"Saint Michael Archangel,
defend us in battle,
be our protection against the wickedness and snares of the devil;
may God rebuke him, we humbly pray;
and do thou, O Prince of the heavenly host,
by the power of God, cast into hell
Satan and all the evil spirits
who prowl through the world seeking the ruin of souls.
Reportedly, Pope Leo XIII composed this prayer in 1886 after a particularly scary vision of a conversation between Jesus and Satan. Since then, this prayer has been highly recommended by Catholics and even exorcists.