Prophet Sla:
Yes, I admit that miracle actually happened.
Much of Emperor Shunaiman's recorded actions and abilities cannot be explained apart from whatever power he received from Einhasad.
But I think the deal went both ways. I have discovered that Einhasad possibly required some kind of assistance from this Human who had conquered the continent.
In his turn, Shunaiman needed legitimacy, which he gained through performing miracles.
I think the two of them concluded some sort of contract with each other...