Ace enters the fourth floor with eyes full of anticipation. 

The fourth floor of the library was quite mundane, there was a wooden table and chair. And a small bookshelf that only has five old books. 

Ace quickly stores the books inside the thief's space and scans the wall behind the bookshelf that looks like a rusty old wall. Just as he thought he didn't find a thing! 

'This formation plate is also not connected with the treasury formation just like that old hag said.' Ace thought gravely. 'This is a problem, I can't find loopholes without true and false eyes, how I'm supposed to use treasure opening hands?'

Because treasure opening hands can only be used when he saw flaws with true and false eyes. These two skills were made for each other and with even one of them missing the other was useless as well. 

Before Ace thought since this was a locking formation he would be able to find flaws with true and false eyes but these formations were just too profound.

Now he was just this door away from completing the mission but can't open it. This made him quite frustrated! 

Actually, it wasn't Ace's fault that his skills were powerless so soon, it was just that these treasuries here are made by an empire-level power! It's may not look like it but this place is just too important for the Luminous Kingdom and how they get their hands on these treasuries, was a mystery. 

Moreover, if he even tries to touch that wall to examine it the alarm formation would go off and the grand prince would race here at full speed at that moment. 

No matter how confident Ace was, he wasn't when facing a Qi River realm expert. His last experience with a Qi River has almost got him killed and doesn't want to take any chance with them either.

  'Did I had to rob the Grand Prince now?' Ace thought gravely but quickly shook his head, 'If they even get the news I was in the city and wanted to rob the treasury it will be night impossible for me to remain here much less infiltrate this place so easily again.'

Ace knew he was now riding the tiger's back. Once Aspen report his presence or he killed her to shut her mouth the security level would definitely be raised by it. Grand Prince might become highly alert because of it. 

If that were to happened Ace wasn't confident enough to complete the mission in reaming time. 

He was truly coming here full of spirit and confidence to complete the mission tonight but end up kicking a hard place. 

This gives him another lesson to never act so quickly and check every minor detail before doing thievery of this magnitude. Well, what can he do? Ace wasn't a real thief or didn't know the true way of thievery, he was learning with errors.

'Did I have to leave in the end after coming so close?' Just as Ace was on the verge of giving up a playful voice buzz in his mind,

"[Host can simply take the whole treasury. If you can't open it now, it didn't mean you can't open it in the future.]" 

Ace felt a huge fog has been lifted from his mind when he heard his, 'Why didn't I think of it!' 

But the next moment all his excitement die down, "I can't do that the moment I touched the wall the alarm would go off. Besides if I want to take the treasury, I have to take the entire floor!" 

Ace wanted a further explanation because he knew this wasn't the system's voice and another one that he has been hearing now and then. 

However, no further answer was given as if Ace has to find the rest on his own after the hint. 

Ace smile bitterly because he knew now he was on his own, but just that little clue was enough for opening many further possibilities for him. He begins to think at high speed while examining the whole floor.

'Right where is the second treasury?' This suddenly thought came to his mind but quickly shook his head, 'I can't even open this one how the hell I'm supposed to open the other? Now I just have to complete the mission somehow.' 

Ace has already given up on the second mysterious treasury that even Aspen didn't know where it was. He would be happy just by taking this treasury somehow. 

Suddenly a thought surfaces his mind as he quickly opens the system's report and begins to check something hastily. It was as if a curtain has been lifted from his eyes. 

'Why didn't I think of it at that time, it was always there!'

Ace's eyes sparkle brightly as he looked at the rusty old wall. He takes a deep breath and forwards his hand towards it. If what he thinks was really the case then all this was very simple!

The moment his hand touched the wall, it vanished and a deep thirty cubic meters empty area appeared! 

There was nothing there and how could there be? Because a thirty cubic meters metallic box appeared in Ace's thief's space at this moment! 

This was excitedly treasury of the Luminous City Prince's Manor! 

After seeing the treasury appearing in the thief's space, Ace was so thrilled he wanted to laugh out loud. 

All this happened because Ace has finally noted a very important point of the scout report and that was the formation was on a middle-grade treasury! 

It simply means it wasn't a part of the entire floor and a different tangible object! This means he can simply take it if he has large enough storage space.

Ace finally understand what that hint means as he cursed his foolishness to not be able to notice this particular point and didn't think of taking the entire treasury!

Furthermore, no one would've even thought that someone has this big of a space to take an entire treasury, and even if had one they can't store this treasury inside because something is living inside! 

However, Ace was a rarity among rarities, not only did he have large enough storage space he even has living storage space! If even one of the factors were to miss he would never be able to store the treasury.   

Ace looked at the empty area happily but quickly calm down because he didn't open the treasury by disabling the formation and even touched it. That's mean the Grand Prince would be coming here soon and he had to escape now!

But before leaving Ace takes out his own wanted poster and place it on the empty table while grinning evilly. 

Ace quickly reached the entrance of the library where Aspen was still unconscious. 

He places the formation plate in her hand, he wanted to take these formations with him but can't because they were not like Dulce's barrier formation. And that plate was nothing but junk without them so he decided to 'give it back.' well, it was more like he was digging a grave for Aspen.

Ace quickly leaves the library with a racing heart as he heads straight to the city gates, just like he always does!

In ten minutes, the city gates were in his view.

'I've finally succeeded.' Ace thought excitedly when suddenly a horrifying pressure descends on the entire city out of nowhere!

Ace's pupils shrink as his eyes narrowed into slits because he never felt this kind of pressure before. It not he can't move in this pressure since it was quite far from him, besides in front of heavenly punishment pressure this was nothing for him. 

It was just that Ace had a feeling that something is watching him through this pressure and stealth wasn't enough to protect him! 

'Not good!' Ace felt his soul sense give him a grave warning just like when he encounters the Orb Guardian but it was more critical! 

He has been located! 

With gritting teeth Ace take out the invisible bead and crushed it! 

Because Ace felt if he didn't use this bead he will never be able to escape this city. The moment Ace crushed the bead the sensation of being watched vanished and he quickly cross the city gate.

Ace only had a minute to escape the range of this unknown aura. He used only silent steps with the full power of his cultivation base and head straight west, towards the border of the land of cities and kingdoms!

In thirty seconds, Ace was feeling the pressure but it was vague and he knew he was almost outside of the range of that terrifying being. 

'Is that a Qi River Core Cultivation?' He couldn't help but think oddly, 'Just what the hell is the deal with that city.' 

After the minute of invisible bead was over Ace was finally outside the field of that expert. 

He looked back with curious eyes just to see how far he was from the city and nearly forgets to breathe after what he saw!