That was a longing for replenishment of "power" and "law."
The book not only contained fragments of the Blood Holy Scripture but also transformed all forged Divine Power and laws towards the Blood Holy Scripture.
In other words, the Crimson Queen Royena was probably attempting to "complete" the Blood Holy Scripture using those cursed pages as a blueprint and various Divine Power items as materials.
And as for why Royena wanted to "create" the Blood Holy Scripture... Combining the experiences of the past few days, Charlotte had guessed it more or less correctly.
"Unlike other Bloodlines, the Harcos Clan's Bloodline Curse has evolved beyond the typical Bloodline Curse; it has merged with some other power."
"That power... is likely to be from the same source as the white mist behind the odd stone door."
