This is how I learned the prayer over 50 years ago and it
St. Michael the archangel, defend us in battle; be our protection against the malice and snares of the devil. We humbly beseech God to command him, and do thou, O prince of the heavenly host, by the divine power thrust into hell Satan and the other evil spirits who roam thrugh the world seeking the ruin of souls.
That line seems to have fallen by the wayside and I think it is important because in that we pray to God to give St. Michael that power as I read it.
Latin scholars may find an even more accurate meaning in this the original prayer in Latin
Sancte Michael Archangele, defende nose in proelio; contra nequitiam et insidias diaboli esto praesidium. Imperet illi Deus; supplices deprecamur; turque, Princeps militiae celestis. Satanam aliosque spiritus malignos, qui ad perditionem animarum pervagantur in mundo, divina virtute in infernun detrude.