What do the images of the serpent’s root, the adder, and the flying fiery serpent represent?
Isaiah 14:28–29 (ESV)
28In the year that King Ahaz died came this oracle:
These represent ever-worsening enemies who were to follow. For example, Sargon II, who reigned from 721 BC, carried out several attacks on various Philistine cities, according to Assyrian inscriptions.
28 In the year that King Ahaz died came this oracle: