Tang Li Xue took out a mid-tier spirit stone from her space pouch and used it to illuminate her way since all mid-tier spirit stones were emitting a faint light.

The light from the mid-tier spirit stone was too dim, so it was far from enough from illuminating the way in front of Tang Li Xue like a flashlight, but she could still see everything clearly with her fox eyes.

There were countless ancient-looking murals carved on the entire cave's right and left walls, ceiling, and even the floor. 

Tang Li Xue explored the dark cave for a few hours, but she still failed to find any clues on how to complete this last trial.

Tang Li Xue only kept walking forward from the beginning until now in this few hours, but she still could not see the end of the cave.

"This cave is really strange... Why does it seem that I only walk in the circle all this time?" Tang Li Xue murmured and frowned deeply while pondering her next moves for a while.

In the end, Tang Li Xue decided to take out many low-tier spirit stones from her space pouch and dropped them one by one on her way while kept walking forward like before. 

In about an hour or so, Tang Li Xue's expression turned dark and gloomy when she saw low-tier spirit stones that she already dropped on the ground before.

"Damn it! So, my guess is right. We are only walking in the circle all this time!" Tang Li Xue cursed while gnashed her teeth in anger since she already wasted several hours of her time walking in the circle in this dark cave.

Tang Li Xue really was really having a great headache right now... because this dark cave only has one way! She could only walk forward or turned around and walk back to the path he had already walked before.

Nya~ Nyaaan~ Nyaaaaaw~!

Just when Tang Li Xue felt gloomy and confused about what she needs to do in this dark cave to complete the last trial, Little Loki, who still sat leisurely on Tang Li Xue's right shoulder, suddenly meowed while pointing its small furry paw onto the cave's wall.

"What is it, Little Loki? Is there something strange there? Let's take a look together then." Tang Li Xue asked as she erased her gloomy expression and replaced it with a gentle smile on her extremely beautiful face. 

Tang Li Xue took Little Loki from her shoulder and hugged it while gently patting its tiny furry head as she approached the cave's wall that Little Loki pointed before.

"What is wrong with this wall? Is there a secret path behind it? Or maybe a strange item like the crystal orb in the previous trial is hidden behind it?" Tang Li Xue raised Little Loki and asked to it again with a tone filled with curiosity.

"Nya~ Nya~" Little Loki meowed while profusely shook its furry little head to deny all Tang Li Xue's questions.

Tang Li Xue frowned in confusion, then she put her slender finger on her chin and muttered while thinking deeply: "Are you trying to tell me that these ancient murals might be our way to complete this last trial?"

"Nyaaaaaw~!" Little Loki finally nodded its tiny furry head signaled that it thought so.

Tang Li Xue stared at the ancient murals carved on the cave's wall with a serious expression for ten minutes or so before nodded her head and blurted out: "All right..... I have absolutely no idea what these pictures mean."

Little Loki almost slipped out from Tang Li Xue's embrace and fell when it heard Tang Li Xue's word.

It rolled its third eye in scorn while thinking: 'Then why do you keep staring at those murals for so long if you cannot even understand any of it?!'

Tang Li Xue coughed with an embarrassed expression when she felt Little Loki's scorning gaze, so she tried to state her deduction to Little Loki to make up for it: "Cough... I think these ancient murals are not that simple to read or understand. It should be written with some kind of code to confuse us, and we must carefully decode it to clear this last trial."

Little Loki nodded its tiny furry head again, but Litte Loki also became more pessimistic at Tang Li Xue on clearing this fifth trial since Little Loki knew that Tang Li Xue's brain was not that bright after sticking together with her all this time.

Tang Li Xue stretched her right hand to touch the ancient murals on the wall, but the archaic voice suddenly spoke to her again right after Tang Li Xue's right palm was touching the ancient murals on the cave's wall.

"Not bad... Your guess is correct. These ancient murals were personally encoded by my real self when he was alive and carved onto this spatial cave."

"The ancient murals here are actually recorded everything I managed to comprehend in my life before I died, from all of my martial art techniques, all cultivation methods I knew, and even my cultivation's experiences."

"Your task this time is to decode these ancient murals and comprehend at least 30% of the overall content. Your time is only three days, so use it well... Sigh... forget it... I know you will never be able to decode and comprehend them in three days... Since you are the first one to go this far, I will be more lenient and give you seven days to comprehend them."

"If the seven days of your time are up, and you failed to comprehend 30% of the overall content, you will only be kicked out from this tomb. I did not lie to you, right? No live threatening danger at all in this last trial."

"But you do not need to feel disappointed if you failed to pass this last trial. Although you will not get my inheritance, but I am pretty sure that the content of these ancient murals is more than enough to make up for all of your efforts."

The Tomb Owner's Will ended his explanation, but Tang Li Xue twitched her pink lips in displeasure since she could detect a trace of mocking in his tone.

The Tomb Owner's Will was clearly looking down at her, and he even bothered to say a few words to comfort Tang Li Xue as if he was so sure that Tang Li Xue would certainly fail to pass this last trial.

'Damn, this old man is clearly looking down on me, right? Did he really think that I am so stupid and surely cannot complete his lame last trial?! Tsk! How dare he... Then I will show him how smart am I and make him gawking at my greatness!' Tang Li Xue thought while fuming in anger at the Tomb Owner's Will. 

Tang Li Xue sneered coldly and said back to the Tomb Owner's Will: "Three days? Seven days? Do you really think I need that long to decode these ancient murals! Comprehend only 30% of its content? Hehehe... You really think too highly of your records! With my superior intelligence, I only need thirty minutes to comprehend ALL of the content!"

Even Little Loki in Tang Li Xue's embrace dropped its jaw in shock and became completely dumbfounded for a few moments when it heard Tang Li Xue's cocky declaration.

"Young one, do not get too conceited. Do you know what you are talking about? You even need more than one hour to go around the cave, then how could you comprehend all of the content in just half an hour?" The Tomb Owner's Will surprisingly gave a logical reply instead of scolding Tang Li Xue.

Even Tang Li Xue herself became speechless for a few moments because of the reply from the Tomb Owner's Will.

"Cough... Cough... You do not need to worry about it. I already memorize every ancient mural engraved on the ground, walls, and ceiling when I walked around the cave before. I only need to decode every ancient mural in my mind right now, so thirty minutes is more than enough to finish it." Tang Li Xue immediately said a random reason that she could think about to cover it.

"All right then... I will respect your wish. Starting now, you will only have thirty minutes to decode and comprehend all of the ancient murals carved in this cave. If you failed to do it, I will kick you out from this tomb." The Tomb Owner's Will easily yielded and changed the rule according to Tang Li Xue's conceited declaration.

Tang Li Xue still felt really dissatisfied since her provocation failed to make the Tomb Owner's Will angry.

Of course, Tang Li Xue did not become blindly confident in her intelligence without any proper reason. 

Even Tang Li Xue herself would never believe if she could really do that, but fortunately, she has an OP cheat.

[Do you want to comprehend [Heavenly Sword Immortal's Manual] at the cost of 700 Deity Coins? Yes/No]

Tang Li Xue got this notification from her system the moment when she touched the ancient murals engraved on the wall.

When Tang Li Xue wanted to approve it, she suddenly felt unwilling and heartache since her total Deity Coins was only a bit more than 700.

Because if she spent 700 Deity Coins to comprehend this [Heavenly Sword Immortal's Manual], she would not have any more Deity Coins to comprehend [Yin and Yang Chaotic Formula], and she surely needs much longer time to accumulate 1000 Deity Coins. 

"But wait a minute... there is something strange here. There are so many things written in this cave, but it only cost 700 Deity Coin, but why I must spend 1000 Deity Coins to learn [Yin and Yang Chaotic Formula]?!" Tang Li Xue murmured in confusion.