Plague #5 comes sweeping in. All Egyptian-owned livestock—donkeys, cows, sheep, camels, and horses—are hit with a nasty thing called pestilence, a disease that wipes them out. All Israelite livestock are spared. Natch.
Pharaoh again refuses to let the Israelites go. He's really not getting the picture.
Plague #6 is a nasty one. Moses takes some kiln soot (dust gathering at the bottom of a pottery oven), throws it in Pharaoh's face, and nasty boils pop up all over all the Egyptians' bodies. Ew.
Pharaoh's magicians not only can't fix this plague, but they actually fall before Moses.
God again makes Pharaoh stubborn, and so Pharaoh plays his part and refuses to let the Israelites go.
God explains to Moses why he continues to "harden Pharaoh's heart," saying, "I have let you [Pharaoh] live to show you my power and to make my name resound through all the earth" (9:16). So this is all for self-exaltation?
God unleashes Plague #7. This is it, folks. The original fire and brimstone passage. The seventh plague is a huge amount of hail, accompanied by fire raining from the sky. And guess what? None of it hits the Israelites.
Pharaoh finally relents, and tells Moses to call off the fire. Moses does so, but then Pharaoh decides—surprise!—to keep the Israelites in slavery.