Azera Floating City, Azera Grand Library,
Li Si stood before the Magic Crystal, happily flipping through the catalog of Legendary-level spellbooks collected by the library.
These were all the most precious and highest-tier knowledge. Just from the titles alone, one could tell how rare the magical knowledge recorded within these books was.
"Netheril Forbidden Technique Catalog: Detailed Explanation (64th Edition)"
"Secret Volume: Legendary Spell Time Stop"
"Secret Volume: Legendary Spell Wish Spell"
"Complete Compendium of Undead Magic (Legendary-level)"
"Azera's Elemental Golem Manufacturing Manual"
"Azera's Floating City Construction Notes"
Li Si delightedly browsed through all the Legendary-level spellbooks in the Azera Grand Library, happily yet anxiously making his choice.
These Legendary-level spellbooks were indeed exceedingly precious. Each one practically represented the pinnacle of a mage's research in a particular field.
In particular, Li Si had never seen the casting methods for ultimate spells such as the Legendary Spell Wish Spell and Time Stop from Teacher Stephens.
Of course, perhaps Teacher Stephens had hidden those ultimate spells away to keep him from aiming too high.
Wish Spell and Time Stop were both among the most renowned Legendary-level spells. Their mysteries were beyond even the gods' understanding.
Beyond that, secrets such as Azera's Elemental Golem Manufacturing Manual and Floating City construction methods were also incomparably precious, along with various spell compendiums that recorded the highest secrets of magic.
To Li Si, all of these were immensely valuable troves of knowledge, but he could only choose one for now.
After all, Black Cat could only raise his authority to Gold-level. He could choose only one Legendary-level spellbook each month.
From Black Cat, he learned that the so-called Gold-level authority in this grand library did not correspond to Gold-level strength, but to one's contributions to Azera Floating City.
There were not many people with Gold-level