The moment Roa stepped into the barrier, the barrier quickly repaired itself, and the hole corroded by the ring was quickly restored to its original state.
However, almost the instant the barrier disappeared, in a room at the very top of the Demon King's Castle, someone opened their eyes at this moment and peered downwards.
Almost at a glance, they saw Roa strolling leisurely.
As if sensing someone's gaze, Roa looked up to the top.
Roa and that person made eye contact.
Both maintained a brief silence, but to Roa's surprise, the other person actually winked at him.
'They saw me?'
This was Roa's first thought. Almost instinctively, he wanted to go on a rampage and charge straight in.
However, the person standing on the top floor didn't say anything, but continued to size him up with an interested gaze.
No alarms were raised, and the castle was still the same castle, appearing very deserted.
'Hmm, they want to see what I'm planning to do?'
Instantly, Roa understood the other person's thoughts.
Roa felt the consumption of magic power, which wasn't much, but for ordinary people, the amount of magic power consumed was roughly equivalent to two and a half Megumins.
Of course, Roa's "not much" was only in Roa's terms. For other adventurers, this was not a small amount.
Without making eye contact with the other person again, since they weren't making any extra moves, he didn't plan to do anything either. Roa began to move forward.
Two minotaurs stood in front of the castle, and two minotaurs stood outside.
But the two minotaurs in front of him gave Roa a listless expression.
The two didn't feel anything about Roa's approach or the loosening of the barrier, standing motionless at the door.
It wasn't until Roa approached that he realized that these two minotaurs actually had their eyes closed.
Well, slacking off at work.
Roa was a little speechless, but didn't say anything, and began to step forward.
The Transparent World and Lurk skills were almost at their maximum level of concealment.
Moreover, the characteristics of the Transparent World allowed Roa to perceive almost everything. The structure of the first three floors of the Demon King's Castle was almost instantly mapped out by Roa. As for why not all the floors, it was because the floors behind were wrapped in magic power, making it difficult to see clearly.
But thinking about it, if it was really that easy for Roa to see through, this Demon King would be completely useless.
Roa began to step forward.
First floor: The first floor of the castle was very spacious, with many guards walking back and forth.
However, these guards felt very lazy, but their aura was considered strong, and their levels shouldn't be low.
On the way to the second floor, Roa saw the gatekeeper of the first floor.
An elite monster.
Roa didn't recognize the elite monster. Roa narrowed his eyes and stepped forward.
However, when Roa passed by the other person, this elite monster suddenly looked to the side.
It was exactly Roa's location.
Even with the Transparent World and Lurk skills activated, he was discovered by the other person before he could even sneak up to the second floor?
Although he was caught on the spot, Roa didn't panic. Roa's gaze was very calm, and he looked directly at the other person.
This was also a minotaur, but compared to the previous minotaurs, his body was stronger, and the muscles on his body bulged almost like an iron tower. He held a very ferocious iron hammer in his hand, as if he could smash everything into pieces with one hammer.
The minotaur looked to the side, but didn't see anything. He rubbed his eyes, but it was still empty. What he didn't know was that Roa was standing right in front of him.
"Did they discover me? No, it seems that as long as I stand still, the effect of the Lurk skill will be enhanced."
Roa thought to himself, considering how to deal with the next step.
Not finding anything, he yawned, but the minotaur continued to stand on the stairs leading to the second floor.
Roa's gaze flickered, and finally he reached out his hand.
That fair hand almost instantly touched this strong minotaur.
Life Drain, activate!
Almost instantly, a dazzling golden light flashed by, directly enveloping the minotaur.
The minotaur was stunned. The inexhaustible strength that he originally had all over his body was rapidly disappearing, and he suddenly became alert.
But by the time he became alert, it was already too late.
Suppression had already formed. Life Drain was not a joke.
In almost a breath, the fatigue on his body and the drowsiness in his soul instantly swallowed him.
That small mountain-like burly body was instantly drained. The minotaur staggered a few steps, and then the minotaur, who had become skin and bones, fell headlong to the ground, never to get up again.
The monster guarding the first floor was instantly resolved.
The minotaur opened his mouth, but couldn't even say a word.
Roa ignored the guy on the ground and continued forward.
He arrived on the second floor.
The second floor was even more spacious than the first floor. By this point, the executives of the Demon King's army were stationed here.
Usually, the Demon King's army executives who didn't have tasks would live on their respective floors, and would rarely leave their floors unless there was unnecessary trouble.
Of course, sometimes they would still see each other.
Roa didn't know who the Demon King's executive on the second floor was. Roa glanced at it and quickly walked towards the stairs leading to the upper floor.
As for the person he had made eye contact with earlier at the entrance, since the other person hadn't done anything, Roa was too lazy to pay attention to them.
Roa didn't come here to cause trouble, but he was afraid that things would get complicated, after all, his whereabouts might have already been exposed.
Because of the X-ray vision, Roa quickly arrived on the fourth floor, but it was also on the fourth floor that Roa encountered an uninvited guest.
This was a girl with horns on her head, short red hair, and yellow eyes that resembled those of a feline. Well, to be precise, she should be a busty girl with a very good figure, not even inferior to Darkness.
However, at this time, this girl was originally standing in the middle of the corridor, looking sleepy.
Roa could feel the terrifying magic power contained in the other person's body. Of course, this amount of magic power still couldn't compare to Roa's.
But in this world, this level of magic power was indeed quite amazing.
When Roa saw this girl, the girl didn't have much of a reaction. Instead, she stretched lazily, standing in the corridor of the castle, seemingly planning to take a walk.
The next moment, she saw Roa.
Roa looked at the other person, and the other person was also looking at Roa.
This girl made the same action as the minotaur earlier. She rubbed her eyes, seemingly suspecting that she was hallucinating.
'This person also saw me.'
For a moment, Roa felt that his Lurk plus Transparent World was very cheap.
Both of them were stunned for a moment.
After a brief silence, the girl on the opposite side took the lead in breaking the silence and said, "Human?"
Roa nodded slightly.
"Adventurer?"
The girl asked again.
Roa still nodded.
The girl took a deep breath, then exhaled, and said with a serious expression, "The front is the Demon King's bedroom, why don't you withdraw?"
Roa: ???
Roa took a deep look at the other person and directly asked, "You are?"
"My name is Wolbach, one of the Seven Generals," the girl named Wolbach said.
Roa's eyes moved, looking at the rather outrageous girl in front of him, and said, "What if I still want to continue forward?"
Wolbach was a little speechless, but she kindly advised, "Adventurer, you are alone. If you want to defeat the Demon Lord, please form a small team and come back. This is not a place you should be. Although I don't know how you got in, now that I've seen you, I won't easily let you wander around the castle, or I would be derelict in my duty."
Wolbach glanced at Roa and continued, "It's fortunate you met me. Hurry and leave. This is really not a place for you. Any other Demon Lord's executives would kill you."
Today's experience was truly strange. A Demon Lord's executive was advising him to leave quickly instead of killing him directly.
However, since the other party had already said this much, it seemed better for him to retreat.
This time, he came purely to take a look.
He was spotted as soon as he entered. If he got entangled this time, reinforcements would probably arrive soon.
Then, Roa might face an encirclement by the Demon Lord and six executives, as well as attacks from various monsters in the castle.
Somewhat troublesome.
Looking at the woman in front of him, Roa really wanted to force his way through.
But her aura was not weak. Unless he used the Sword of Light to instantly kill her upon meeting, it would feel very tricky.
However, she discovered that his first thought wasn't to attack, but to advise him to leave quickly.
This was very troublesome.
She didn't seem like the brutal type of enemy.
Roa and Wolbach locked eyes. Finally, Roa nodded slightly and said, "Alright, since you didn't attack me, I'll leave for now. I came here purely to take a look. So, beautiful lady, see you next time."
After speaking, Roa activated Concealment and the World of Transparency again, and walked back the way he came.
Not long after Roa retreated, a somewhat aged voice came from behind Wolbach.
"Wolbach, why did you let that guy leave?"
Wolbach didn't turn around, and casually said, "What, you were planning to keep him here? Don't tell me you didn't sense the enormous magical power he possessed."
The other party just sighed and didn't say anything else, allowing Roa to leave the castle.
No one stopped him during the departure process, and everything went smoothly.
Following the same method, Roa injected magic power and easily opened the Demon Lord's barrier, then walked outside.
Roa looked up at the top of the Demon Lord's castle. The person who had been standing at the top had disappeared. Roa's eyes flickered. Now that he thought about it, the other party was probably waiting for him to go deeper, preparing to finish him off once and for all.