You consumed the Magic Book "Powerful Sealing Spell Version 6.0."
You obtained the level fourteen spell—Powerful Sealing Spell.
Limited by your class level, Powerful Sealing Spell had been downgraded to Weakened Powerful Sealing Spell, with effects equivalent to a level ten spell.
A whole string of explanatory text appeared before Xu Nan's eyes. After roughly going through it, he learned that the Powerful Sealing Spell Magic Book Emma had provided was version 6.0, further optimized upon its original foundation. This spell had originally been a third-tier spell. Although Xu Nan could forcibly digest it with the Gluttonous Tome, the consequence was a downgrade in the spell's effects.
There was nothing to be done about that. If the Gluttonous Tome were truly that overpowered, Xu Nan would have long since scoured the world for Legendary Magic Books to chew on—of course, every Legendary Magic Book possessed its own sentience. With Xu Nan's current pathetic combat strength, he would probably fail to eat the book and get eaten instead...
No matter what, the sealing effect of Powerful Sealing Spell was definitely stronger than Evocation Spells like Fossil to Mud.
Hisses came from within the cave. Xu Nan vaguely saw firelight and heard panicked shouts!
It was the Blood Worship Cultists.
"The Aberration of the Seven Blood God will attack any object with signs of life, regardless of whether it is friend or foe."
Emma explained, "Those Blood Worship Cultists are probably done for, but they won't be able to hold it off for long."
"Aberrations have a strong aversion to Powerful Sealing Spell. Find a way to seal this place, and we'll have enough time..."
At this point, her voice suddenly stopped. Her brows furrowed tightly as though she were considering something.
"Time for what?" Xu Nan keenly noticed something odd