“Pharaoh will see them and will be comforted over all his multitude, even Pharaoh and all his army, slain by the sword, says the Lord Yahweh. For I have caused (or ‘allowed') his terror in the land of the living, and he will be laid in the midst of the uncircumcised, with those who are slain by the sword, even Pharaoh and all his multitude, says the Lord Yahweh.”
The sight of the other opponents of Babylon in the same predicament, who have also been ‘slain by the sword' of Yahweh/Nebuchadnezzar, will bring comfort to Pharaoh. But this very fact confirms his descent there. The mighty Pharaoh joins all the rest in Sheol. He is no different from them in spite of Egypt's claims.
‘For I have caused (or ‘allowed') his terror in the land of the living.' Just as previously Yahweh had hardened Pharaoh's heart in Exodus, so now He had caused, or allowed, his terrorising of others, so that he might suffer his due fate. Pharaoh was in the final analysis totally under the influence and power of Yahweh. The point is not that Yahweh is to blame for the terror, but that in His sovereignty it could not have happened had He not allowed it. The option was His and not Pharaoh's. And it was in His purpose because He purposed to destroy Egypt.
So end the oracles against the nations, demonstrating Yahweh's power over all the nations round about Israel, and especially over the divine pretenders of Tyre and Egypt. And it ends with the reminder that all empires die. There could now be no doubt in the minds of Israel about His supreme power, and it would give them hope for the future.