I posted this elsewhere. The original Dragon Slayer.

St. Micheal

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.

Amen.