The rod that struck Philistia represents a king who sent his army to attack them. Being broken represents either being dead or being defeated. Alternate translation: "the king that sent his army against you is dead" or "the army that attacked you is defeated" (See: [[rc://en/ta/man/jit/figs-metaphor]])
These two phrases are both the image of a serpent's offspring being even more harmful than the serpent. They represent a king's successor being more powerful and cruel than the first king. (See: [[rc://en/ta/man/jit/figs-parallelism]] and [[rc://en/ta/man/jit/figs-metaphor]])
Here the word "fiery" probably refers to the serpent's poisonous bite, and the word "flying" refers to its quick movements. Alternate translation: "a quickly moving poisonous snake" (See: [[rc://en/ta/man/jit/figs-metaphor]])