1)
What is "mi'Ktzei ha'Shamayim"?
1.
Radak: This is an exaggeration for how far, as if they touch Shamayim. They are from the east.
2.
Malbim: It is from the end of civilization. The verse depicts that the camp is so close that one can ask where they come from, who they are, and why they came.
2)
What are "Klei Zamo"?
1.
Rashi: They are the Giborim of Paras and Madai.
2.
Radak: It is the army that Hashem conducts.
3)
Will they strike the entire land?
1.
Rashi: They will strike all of Bavel.
