What he felt was the pressure from the Heavens.
When Azief first returns and confirms that this is his Earth, he began trying to feel the Heavenly Will.
He could tell that the barrier that he had created to warn the Heavenly Will not to enroach on his authority is already very thin.
He could tell that in his absence the Heavenly Will once again try to regain full control.
That is the other reason why he did not use Heavenly Will to augment his Divine Sense.
He does not want to detected by the Heavenly Will. Every being under the Heavens is monitored by the Heavenly Will. Other than a few people who could shrouded themselves from the eyes of the Heavenly Will, the Heavenly Will sees all.
And Azief is one of the few people on Earth that could hide himself and even Katarina from the eyes of the Heavenly Will
