The pages fought over by the Day Knight and the Eternal Dark Banshee were likely from the same book that bred the Ancient Scholar Butterfly.
Moreover, they formed the anchoring catalogue!
This powerful Sacred Relic, even after being fought over by many strong competitors, only scattered its pages rather than being destroyed.
How could it possibly just disappear suddenly due to the birth of a Fantasy Species?
As for the skill "Paper Heart", it seemed more like a product of wish fulfillment than the actual catalogue itself.
The greatest possibility was...
... that the power it controlled was the contamination of paper, recording everything, twisting all things.
So, from the beginning, Gary Smith let the Paper Divine Contamination take root in the Meadow, drawing nutrients from the breath of life spread by the Meadow and the Chaos Egg, and growing along with the transformation of the Meadow.
Everything was for the harvest time today!