Exodus 7 – The true conflict is between our heavenly Father and the false Egyptian gods. 2017

Exo 7:3
"But I will harden Pharaoh's heart that I may multiply My signs and My wonders in the land of Egypt.

Elohim is reaffirming to Moses that He is the one who will harden Pharaoh's heart. He mentioned this previously in Exodus 4:21.

Exo 7:4
"When Pharaoh will not listen to you, then I will lay My hand on Egypt, and bring out My hosts, My people the sons of Israel, from the land of Egypt by great judgments.

Exo 7:5
"And the Egyptians shall know that I am the LORD, when I stretch out My hand on Egypt and bring out the sons of Israel from their midst."

Egypt will know the name of Yahweh and that He did these powerful feats.

Exo 7:6
So Moses and Aaron did it; as the LORD commanded them, thus they did.

Exo 7:7
And Moses was eighty years old and Aaron eighty-three, when they spoke to Pharaoh.

Exo 7:8
Now the LORD spoke to Moses and Aaron, saying,

Exo 7:9
"When Pharaoh speaks to you, saying, 'Work a miracle,' then you shall say to Aaron, 'Take your staff and throw it down before Pharaoh, that it may become a serpent.'"

Moses and Aaron had previously performed these miraculous signs before the elders of Israel. Now they will do them in front of Pharaoh. The significance of the signs is to show that the true conflict is between Elohim and the false Egyptian gods.