Back at Ingrid, Azrail had come upon that book, the one called 'Heavenly Opposers,' the very book that gave detailed explanations of everything happening in the cosmos, ones about the known and unknown. The drama, sadness, and loss of all the great characters that rose to power, the hidden realms, and great knowledge that people would kill for, everything was there in the book.
He had stored everything in his mind. All information was within him, and when he got reborn back here, Azrail, in his controlled mind, made several plans using that knowledge. But after being freed, Azrail thought of giving that knowledge up. There is no guarantee that those beings that were controlling him might not use the same knowledge to trap him, he had that fear of using his knowledge till Death guaranteed its safety.