This is me speaking freely to you, Chi. It is shocking and way beyond me honestly. Here, if this was a game of chess, GOD had HIS checkmate move three plagues ago yet HE insisted that it was not enough by hardening the heart of Pharaoh.
So for Pharaoh, it was GOD's way of stretching his doubt to its limits; how far could his query of GOD go? However, Pharaoh did believe. In the moment of torment, in the evidence that these things were by the hand of GOD, Pharaoh believed.
The plagues upon Egypt were GOD's way of letting Pharaoh know that there was more that he did not know and more than he did know.
Humanity needed to be saved from death; thus, JESUS died to save us into life. For GOD’sBondMan, GOD uses what we need to be delivered from to deliver us in form.