With Rowan's growing understanding of Intent, he tried to decipher the method his city of Sheol was burning away the Intent in the bodies of his Angel, this process was quite special and was a superior version of what the Chaos Door did for him.
Already he could see that the only Consciousness Pillar that was free from the Intent of Chaos was reverting. His face that had been etched on the pillars was slowly fading away, it would take a while, maybe a decade or more, but the Intent that was taken away would return.
Except for the Intent of Chaos, Rowan also noticed another one that was slowly returning, but much more slowly, it was red and slimy and filled him with a deep sense of disgust. If the Chaos Door had not purged his consciousness pillar old the Intent entwined with it, then he would not have realized that he did not only have one seemingly immortal intent inside his body but two.