Charles drew upon his magic power and formally began his attempt to break through to the Four-Ring realm.
During his time in the Abyss, his knowledge related to the Abyssal Grimoire had been improving at a breathtaking pace.
Who knew how many kinds of demons Charles had dissected and studied, even squeezing bloodline potions out of them.
Throughout this process, Charles's research into demons had advanced by leaps and bounds.
More and more demon species, mutations, and wizard-like spells had come under his command.
Even many demons themselves knew less about their own kind than Charles did.
With such learning ability and such research results, Charles had long possessed more than enough knowledge to advance to Four Rings.
Not to mention that ever since connecting with Purgatory, his research materials had gained several more kinds of devils.
From lemures, nupperibos, spined devils, legion devils, all the way to the highest-ranking pit fiends, Charles had studied them all.
He dissected their bodies, researched their bloodlines, and mastered their abilities.
All of it had already swept away every threshold he needed to cross.
Finally, when the Abyss's favor descended upon Charles.
This most difficult step was also complete.
Within the Book of Causal Paths in Charles's body, a golden page silently detached itself and transformed into pure power of causality and fate, burning away.
Within the tableau painted by that causal power, Charles's fate of advancing into a Four-Ring Wizard was gradually anchored.
Just as Charles had said, after he had already overcome the many major hurdles required to become a Four-Ring Wizard, this moment of advancement did not consume much of the Book of Causal Paths' power.
His magic power began to surge and condense, transforming into a stronger force.
Charles's spiritual power roiled violently, sweeping over the surrounding devils again