After some contemplation, Herag chose the category of books about rules to supplement his current lack of understanding in this area.
"In-depth Understanding of Rule Principles"
"Exploration of Rule Principles"
"Introduction to Rules"
"Exploring the Principles of Enchantment Starting from Succubi"
...
Herag borrowed thirty-two books at once, all of which were research works on rules.
These books arrived quickly, packed together in a small wooden box.
In the following month, Herag shut himself away to focus on studying these books.
Though these books were also recorded in Shenlan's database, Herag still needed to learn and comprehend them fully by himself.
After skimming through these books, Herag's understanding of rules improved by leaps and bounds.
These books were authored by particularly outstanding wizards from ancient times to the present who appeared in the Boundary Land, containing their thoughts and reflections, which were incredibly helpful to Herag.
