Self aggrandizement is also an instrument of polytheism and idolatry as we see in the story of Samiri.

Moses asked Samiri why he did that (Created the idol of the calf) and he answered, “I saw something that these people could not see. I discovered the sign of the Gabriel the Messenger of God and then I erased them from my mind and reverted to polytheism and my ego made it beautiful in my sight.”

We also learn from the Qura’n that satanic deceptions and the temptations that he puts in the hearts also play a role in the spread of idolatry. We read in the story of Bilqis in verse 24 of Surah Naml as narrated by the hoopoe, “I saw her and her people bow before the sun, rather than God, Satan has made their deeds fair seeming in their eyes and so he turned them away from the right path, so they are not rightly guided.”

But we should remember that illusions of the soul and satanic temptations are only whims, blind following, bias, and arrogance. This is why we did not mention Ego and its illusions separately.