King James Version
And when they shall have finished their testimony, the beast that ascendeth out of the bottomless pit shall make war against them, and shall overcome them, and kill them.English Standard Version
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,New International Version
Now when they have finished their testimony, the beast that comes up from the Abyss will attack them, and overpower and kill them.