The noun "breath" can be translated with the verb "breathe" or "blow." This image represents God causing the wind to blow away the clouds. Alternate translation: "God blew away the clouds so that the skies were clear" (See: [[rc://en/ta/man/jit/figs-metaphor]])
It is implied that God his holding a sword, and here "his hand" represents that sword. Also, "pierced" represents killing. Alternate translation: "With his sword he pierced the fleeing serpent" (See: [[rc://en/ta/man/jit/figs-explicit]] and [[rc://en/ta/man/jit/figs-metonymy]])