The Lord Demon King is Unfathomable!

Perhaps it was precisely because of that past that she treated Vivian like her true granddaughter and had a rather special attitude towards Luo Yan.

At this moment, her gaze fell on the two approaching people, with a faint smile on her lips.

"Vivian, how come you have the time to visit me today?" Her voice was warm and lingering, with a touch of affection.

Vivian, having put away her parasol, stepped forward with a joyful smile and hugged her arm in a playful manner.

"Professor Adonia! I missed you!"

"We see each other every day, what's there to miss," Professor Adonia teased with a chuckle, "Next time you want me to help you, make sure to come up with a better excuse."

Vivian's cheeks blushed slightly as her excuse was uncovered.

However, being the future little master of the Colin Duchy, her face was much thicker than the average person. She darted her eyes, coughed calmly, and glossed over the matter.

"No, as expected of Professor Adonia... truly perceptive, not a hair's breadth missed... Actually, it's not me who needs to trouble you, it's my... uh, Mr. Luo Yan who has something to ask of you."

She almost blurted out my elder brother.

"Oh?" Adonia looked at her with a smile and did not expose her, then turned to look at Luo Yan, who stood not far behind Vivian—the child recommended to her by Principal Avin.

She continued in a playful tone.

"It's actually the renowned Lord Demon King of Thunder County who has something to discuss with me, I must listen carefully to his troubles."

Coming forward from behind Vivian, Luo Yan nodded slightly and said humbly.

"Professor Adonia, you overpraise me, I'm just a junior, it's really not right to trouble you."

Professor Adonia smiled gently and continued.

"It's no trouble at all, serving you is my honor. I heard you've planted many flowers and plants in the maze of Thunder County, if my Magic Workshop ever lacks rare materials, maybe I'll need to trouble you."

Just small talk.

Professor Adonia paused for a moment, her eyes taking on a hint of scrutiny and interest.

"So, Mr. Luo Yan... what kind of problem has brought you to see me personally?"

Luo Yan said nothing, he gently slid his index finger and took out a Crystal Bottle from his Space Ring.

It contained a sample of the water source from Black Wind Castle, and the transparent liquid swayed gently in the bottle, appearing no different from ordinary water.

Adonia took the bottle, her slender fingers lightly caressing it, and a slight magic power wave instantly transmitted to the bottle, seeping into it along the edge of the cork.

She frowned slightly, gently turned her palm, and lifted the cork, simultaneously activating a change in magic power, causing a wisp of mist to rise from the clear water surface.

Smelling an unpleasant odor, Vivian slightly frowned and stepped back half a step.

Professor Adonia fell into thought, then her eyes focused as she muttered to herself.

"It's actually the power of a curse..."

After speaking, she casually picked a semi-transparent leaf, poured a drop of water on it from the bottle. The moment the droplet touched the leaf, the semi-transparent leaf instantly turned pure black, writhing violently at Professor Adonia's fingertips like a living animal struggling for a few seconds before finally withering and crumbling into pieces.

Luo Yan watched with interest as the leaf withered at her fingertips.

This thing seems pretty good for testing poison; he, the top student at Demon King Academy, had never seen this before.

"Just as expected." Adonia sighed, looked up at Luo Yan, and said solemnly, "This is a battlefield Magic Potion from the end of the First Epoch, known as 'Blood of Corruption,' used for spreading terror and sabotage behind enemy lines. Even when diluted, it can gradually weaken the drinker within three days until they completely lose the ability to act. If one practices the Dragon Divine Sect's Power of Aura and has strength above Bronze Level, they can suppress it through their own resistance. For an ordinary Mage, it would require Fine Steel Level strength to temporarily suppress it with their own power."

"Blood of Corruption?" Luo Yan slightly frowned.

"Yes, its crafting process is extremely complex, and the Alchemist capable of making it must have at least Diamond Level strength and also undergo a special magic ritual." Adonia said slowly, her eyes falling into reminiscence, before continuing with a nostalgic tone, "I remember the last time I saw it was five hundred years ago... after so many years, I didn't expect to see this thing again, especially near Demon City."

Looks like Professor Adonia must have used it before.

However, Luo Yan didn't want to ask what she did with this thing so long ago, after all, in that era of rampant chaos, everything flourished, and even demigods battled on the front lines. When the killing frenzy hit, humans and demons often slaughtered each other's cities; donning a suit and tying a tie were things of later times.

The further back in time, the less restrained the Extraordinary Power, especially in that age where epics flocked, destroying a city or a nation was commonplace.

"Do few people know the Magic Potion recipe?"

"Very few, after all, curse-related Magic Potions have already become less effective on surface humans, they can easily dispel with Holy Light what we've painstakingly concocted; even if left alone, it wouldn't be much. In the end, it's us reinforcing their faith," Professor Adonia nodded slightly, her tone lightly mentioning terrifying matters, "Moreover, strictly from the perspective of spreading fear and cost-effectiveness, there are more efficient means now... and in fact, the way you subtly and quietly spread corrosion is the best strategy."