The Lord would shower hailstones, lightning, and burning sulfur, probably from erupting volcanoes, on Gog and his allies (cf. Genesis 19:24; Revelation 19:21). He would also attack his armies causing bloodshed and disease (cf. Revelation 19:15). This would result in great glory for God among the nations (cf. Revelation 19:6). They would recognize Him as the only true God when He revealed Himself this way. The Lord had used Nebuchadnezzar as His sword against Israel, but He would wield this sword against Gog Himself. [source][source][source]