Notice how these verses fit together...
Revelation 14:7
Saying with a loud voice, Fear God, and give glory to him; for the
hour of his judgment is come: and worship him that made heaven, and earth, and the sea, and the fountains of waters.
Revelation 17:12
And the ten horns which thou sawest are ten kings, which have received no kingdom as yet; but receive power as kings
one hour with the beast.
Revelation 18:10
Standing afar off for the fear of her torment, saying, Alas, alas that great city Babylon, that mighty city! for in
one hour is thy judgment come.
Revelation 18:17
For in
one hour so great riches is come to nought. And every shipmaster, and all the company in ships, and sailors, and as many as trade by sea, stood afar off,
Revelation 18:19
And they cast dust on their heads, and cried, weeping and wailing, saying, Alas, alas that great city, wherein were made rich all that had ships in the sea by reason of her costliness! for in
one hour is she made desolate.
Let’s look at the prophecy.
"At that time shall Michael stand up, the great Prince which standeth for the children of thy people: and there shall be a time of trouble, such as never was since there was a nation even to that same time: and at that time thy people shall be delivered, everyone that shall be found written in the book.”
Daniel 12:1. GC 613.1
When the third angel's message closes, mercy no longer pleads for the guilty inhabitants of the earth. The people of God have accomplished their work. They have received “the latter rain,” “the refreshing from the presence of the Lord,” and they are prepared for the trying hour before them. Angels are hastening to and fro in heaven. An angel returning from the earth announces that his work is done; the final test has been brought upon the world, and all who have proved themselves loyal to the divine precepts have received “the seal of the living God.” Then Jesus ceases His intercession in the sanctuary above. He lifts His hands and with a loud voice says,
“It is done;” and all the angelic host lay off their crowns as He makes the solemn announcement: “He that is unjust, let him be unjust still: and he which is filthy, let him be filthy still: and he that is righteous, let him be righteous still: and he that is holy, let him be holy still.”
Revelation 22:11. Every case has been decided for life or death. Christ has made the atonement for His people and blotted out their sins. The number of His subjects is made up; “the kingdom and dominion, and the greatness of the kingdom under the whole heaven,” is about to be given to the heirs of salvation, and Jesus is to reign as King of kings and Lord of lords. GC 613.2
When He leaves the sanctuary, darkness covers the inhabitants of the earth. In that fearful time the righteous must live in the sight of a holy God without an intercessor. The restraint which has been upon the wicked is removed, and Satan has entire control of the finally impenitent. God's long-suffering has ended. The world has rejected His mercy, despised His love, and trampled upon His law. The wicked have passed the boundary of their probation; the Spirit of God, persistently resisted, has been at last withdrawn. Unsheltered by divine grace, they have no protection from the wicked one. Satan will then plunge the inhabitants of the earth into one great, final trouble. As the angels of God cease to hold in check the fierce winds of human passion, all the elements of strife will be let loose. The whole world will be involved in ruin more terrible than that which came upon Jerusalem of old. GC 614.1
“When Jesus LEAVES THE MOST HOLY, His restraining Spirit is withdrawn from rulers and people. They are left to the control of evil angels. THEN such LAWS will be made by the counsel and direction of Satan, that unless time should be very short, NO FLESH COULD BE SAVED.”
(Testimonies Vol. One, p204)
When Jesus has left the Most Holy Place, then there is no place left to repent as there is no mediator in the sanctuary and this is when Satan has the opportunity and gets the nations to come together as they 'receive power as kings one hour with the beast'. When this comes to pass, the saints are put to the extreme test and cry for deliverance.
“I saw that the four angels would hold the four winds until Jesus’ work was DONE in the sanctuary, and THEN will come the SEVEN LAST PLAGUES. These plagues enraged the wicked against the righteous; they thought that we had brought the judgments of God upon them, and that if they could rid the earth of us, the plagues would then be stayed. A DECREE went forth to SLAY THE SAINTS,
which caused them to cry day and night for deliverance.” (Early Writings 36-37)
The plagues then are falling, it enrages the wicked. Satan sees the desperation so then makes his final move..
“Satan sees that he is about to LOSE HIS CASE. He cannot sweep in the whole world. He makes ONE LAST DESPERATE EFFORT to overcome the faithful by deception. He does this in personating Christ… One effort more, and then Satan’s last device is employed. He hears the UNCEASING CRY FOR CHRIST TO COME, FOR CHRIST TO DELIVER THEM. This last strategy is to PERSONATE CHRIST, and make them think their prayers are answered.” LDE 164-165
This is his last deception. His last and final effort. This occurs after Christ has left the most holy place, after probation is closed on the world, after the plagues have started to come down, and into the time of trouble such as never was.