He specially connected the plagues as attacks on various important Egyptian gods! The staff becoming a snake and eating the snakes of the magicians: Attack on Wadjet, goddess with the head of a snake and guardian of the royal family. The first plague, the river of blood: Mockery of a good omen. The Nile would actually become red once per year, filled with the fertile silt that the incoming flood would deposit on the earth. And yet, this time not only were the red waters appearing at the wrong time and brought no silt, but they caused the death of all fish of Egypt! Doubles as an attack on all gods related to the Nile; especially Hapi, a water god who was believed to bring prosperity and protect the animals in the Nile. The second plague, frogs overrunning Egypt: Another mockery of a good omen, the frogs that would come out of the Nile after the aforementioned flooding. Frogs were a symbol of fertility and the animal of the goddess Heqet. It was firmly believed they shouldn’t be killed, so the Egyptians couldn’t do anything when they would invade their homes. Furthermore, all the frogs suddenly died and were heaped up in stinking piles throughout the land. Not a remotely good omen to an Egyptian... The third plague, swarms of gnats/lice: attack on Set, god of storms and vermin. It should be noted Set would be demonized by various Egyptian cults, but that would happen after the plagues and at this point in time Set was a major guardian god. This was also a statement of YAHs superiority as this is the first plague that could not be replicated by the Pharaoh's magicians. The fourth plague, swarms of flies: Same to the gnats/lice. Also the first plague that differentiates between the Egyptians and Hebrews. The fifth plague, death of the livestock: Attack on Hathor and Apis, two gods of livestock the former of whom was the wife of Ra, the leader of the gods. Also the destruction of the economic livelihood of Egypt considering how much they relied on cows for trading. The sixth plague, boils: Attack on the many healing gods the Egyptians had. The priests being unable to even remotely understand the plague is also a statement of YAHS superiority over both Thoth and Ma’At, Egyptian gods of knowledge, divination, and medicine. The seventh plague, fire and hail from the sky: Another attack on Set, as well as attacks on the goddess of the sky Nut and the destruction of the crops caused by this onslaught was an attack on the crop gods. The eighth plague, locusts: An especially heavy hit to the crop gods as well as the crops themselves. The ninth plague, darkness: An attack on Ra, whom I must remind you was also considered the king of all the gods, as well as the other sun gods like Bastet and Khepri. Also a personal attack on the pharaoh himself considering it was believed he was a descendant of Ra (Rameses literally means "Born of Ra". The tenth plague, death of the firstborn: Alongside being payback for the Egyptians killing the Hebrew firstborns this was also an attack on Isis, another one of the most important gods, whose whole job was protecting Egypt from outsiders, especially the Egyptian children. The plague taking place at night is also another BIG attack on Ra as he is most vigilant at night... So the king of the Egyptian gods being unable to protect children from just one of Yahs servants is a very powerful statement on Yahs incredible might.