They Have Finished -Revelation 11:7-14

Revelation 11:7-14 ESV
7 And when they have finished their testimony, the beast that rises from the bottomless pit will make war on them and conquer them and kill them, 8 and their dead bodies will lie in the street of the great city that symbolically is called Sodom and Egypt, where their Lord was crucified. 9 For three and a half days some from the peoples and tribes and languages and nations will gaze at their dead bodies and refuse to let them be placed in a tomb, 10 and those who dwell on the earth will rejoice over them and make merry and exchange presents, because these two prophets had been a torment to those who dwell on the earth. 11 But after the three and a half days a breath of life from God entered them, and they stood up on their feet, and great fear fell on those who saw them. 12 Then they heard a loud voice from heaven saying to them, “Come up here!” And they went up to heaven in a cloud, and their enemies watched them. 13 And at that hour there was a great earthquake, and a tenth of the city fell. Seven thousand people were killed in the earthquake, and the rest were terrified and gave glory to the God of heaven. 14 The second woe has passed; behold, the third woe is soon to come.

The beast then overcomes the witnesses as foretold by Daniel. We see here again that  God is in control. It is only after their testimony is finished that the beast rises to slay them. It will happen as God said.
The witnesses are dead for three and one half days, which might be considered in light of half of week of the seven days of tribulation. Defeat is turned to victory. Death has been defeated by the life of God. The world rejoices until they see life return and they are raised by God. The fourfold description of the inhabitants who rejoice implies the four corners of the earth, or its entirety. Their ascension to heaven gives final witness to the truth and power of God.
It's not clear if those on earth heard the command, but they did see the witnesses ascend in the clouds. "and their enemies watched them". Many realized the truth at that time and gave glory to God. Many perished in rebellion.

Daniel 7:21-22
As I looked, this horn made war with the saints and prevailed over them, 22 until the Ancient of Days came, and judgment was given for the saints of the Most High, and the time came when the saints possessed the kingdom.

Daniel 8:23-25
And at the latter end of their kingdom, when the transgressors have reached their limit, a king of bold face, one who understands riddles, shall arise. 24 His power shall be great— but not by his own power; and he shall cause fearful destruction and shall succeed in what he does, and destroy mighty men and the people who are the saints. 25 By his cunning he shall make deceit prosper under his hand, and in his own mind he shall become great. Without warning he shall destroy many. And he shall even rise up against the Prince of princes, and he shall be broken—but by no human hand.

Deceit, arrogance, and pride will be hallmarks of the beast. They will be cunningly used we are told, just like the serpent in the Garden.

2 Thessalonians 2:8-12
And then the lawless one will be revealed, whom the Lord Jesus will kill with the breath of his mouth and bring to nothing by the appearance of his coming. 9 The coming of the lawless one is by the activity of Satan with all power and false signs and wonders, 10 and with all wicked deception for those who are perishing, because they refused to love the truth and so be saved. 11 Therefore God sends them a strong delusion, so that they may believe what is false, 12 in order that all may be condemned who did not believe the truth but had pleasure in unrighteousness.

The power of these two witnesses comes from the Lord. He is an all consuming God, who refines and consumes with fire out of heaven, like tongues of fire on the day of Pentecost. The Spirit is given and the word goes forth.
This is the power that mixes with our prayers and finds the ear of our Lord. It raised Jesus from the grave and will do so for us.
The second woe has passed. The third and final woe begins with sounding of the seventh and final trumpet.