Hello Georgea,
I have an idea of the weapon that Archangel Michael uses to slay the devil out of heaven. It is the “sword of Christ’s mouth”, the “keys to the Kingdom” the power to bind beings to sin, which slays souls out of heaven and into hell.
Scripture descibes Jesus as having a “sword” or an “iron rod” coming forth from His mouth. If Jesus proclaims with His lips that a being’s sins are held bound in heaven, the being held bound to his sin cannot go to heaven and is cast into hell. Jesus proclaiming a being bound to his sins is therefore an eternally deadly weapon which casts beings out of heaven and into hell. Jesus gives this weapon to St. Peter and his Successors and it seems Archangel Micheal also has access to this spiritually deadly weapon.
Our great protector Michael the archangle casts Satan out of heaven into eternal damnation by the power of the blood of the Lamb. The sword of Christ’s mouth, the power to hold sins bound is an eternally deadly weapon, attained through Christ’s blood, and Jesus gave this weapon to St. Peter, St. Peter’s Successors, and it appears Michael, to use to protect us with it.
**NAB REV 12:5 **
She gave birth to a son–a boy destined to shepherd all the nations with an iron rod…
…Then war broke out in heaven; Michael and his angels battled against the dragon. Although the dragon and his angels fought back, they were overpowered and lost their place in heaven. The huge dragon, the ancient serpent known as the devil or Satan, the seducer of the whole world, was driven out; he was hurled down to earth and his minions with him. Then I heard a loud voice in heaven say: "Now have salvation and power come, the reign of our God and the authority of his Anointed One. For the accuser of our brothers is cast out, who night and day accused them before our God. They defeated him by the blood of the Lamb and by the word of their testimony; love for life did not deter them from death.
**NAB REV 19:11 The King of Kings. **
The armies of heaven were behind him riding white horses and dressed in fine linen, pure and white. Out of his mouth came a sharp sword for striking down the nations. He will shepherd them with an iron rod; it is he who will tread out in the winepress the blazing wrath of God the Almighty. A name was written on the part of the cloak that covered his thigh: “King of kings and Lord of lords.”
NAB ISA 11:4 The Rule of Immanuel
He shall strike the ruthless with the rod of his mouth, and with the breath of his lips he shall slay the wicked.
**NAB REV 1:16 **
A sharp, two-edged sword came out of his mouth…****…I hold the keys of death and the nether world."
**NAB MAT 16:13 **
Jesus replied, "Blest are you, Simon son of John! No mere man has revealed this to you, but my heavenly Father. I for my part declare to you, you are ‘Rock,’ and on this rock I will build my church, and the jaws of death shall not prevail against it. I will entrust to you the keys of the kingdom of heaven. Whatever you declare bound on earth shall be bound in heaven; whatever you declare loosed on earth shall be loosed in heaven."NAB JOH 20:20
"Recieve the Holy Spirit. If you forgive men’s sins, they are forgiven them; if you hold them bound, they are held bound."NAB MAT 5:22
any man who uses abusive language toward his brother shall be answerable to the Sanhedrin, and if he holds him in contempt he risks the fires of Gehenna.