After all the experience was invested, the level of the thief class finally reached level eleven, but Song Zheng was most concerned about what kind of new skills he could acquire.

The Crippling Poison he had obtained last time was of no use to him.

But when his gaze fell on the skill bar, he immediately lost his mind.

On that translucent attribute interface, the word 'sneaking' is written on it!

This is the skill he has been waiting for for a long time, and it is also the real core skill of the thief!

"I don't know what the difference between the skills provided by this system and the skills learned......" Song Zheng was so excited that he immediately quietly used the stealth skill.

As the skill was activated, he suddenly felt a chill all over his body, and there seemed to be some dark aura around his body, and when the dark aura dissipated, he was already in a stealth state.

"Huh...... Lord Baron? Where have you been, Lord Baron? Catherine's voice sounded immediately, and she noticed Song Zheng's abnormality at the first time.

Song Zheng's heart moved, but he didn't answer, but deliberately circled around Catherine and Gianna.

Song Zheng ...... Are you okay? Gianna was also alarmed, and after she looked around and didn't find Song Zheng, her voice looked very worried.

Seeing their anxious appearances, Song Zheng was pleasantly surprised in his heart, it seemed that the 'stealth technique' provided by this system was much better, even if Gianna and the others were close to him, it was difficult to find him sneaking.

The stealth technique learned from MI7 before is easy to be perceived when it is close to about ten meters, and it is even easier to detect when facing a strong person like Gianna.

Song Zheng did not respond to Catherine and Gianna immediately, but still approached them cautiously, only to be noticed by Gianna until he had approached a meter from the front.

"You almost scared us out of the way when you used stealth, I thought you were in danger." Gianna said with some disgust.

"I'm sorry, I just got some new ideas about this stealth technique, so I gave it a try." Song Zheng explained with a smile, but he was already happy in his heart.

Sure enough, the stealth provided by this system is the real stealth, although I don't know how to do it, but its effect is far from comparable to the skills learned from MI7.

"Lord Baron, you just sneaked away? I thought it had disappeared out of thin air. Catherine came over with a curious face, obviously surprised that Song Zheng had hidden too well just now, and even she had not found any trace of him.

"yes, it's darker here, and the stealth effect is better." Song Zheng said with a smile, when he sneaked just now, he could feel that there seemed to be a mysterious power around his body, perhaps as mysterious and powerful as the 'stealing technique'.

"By the way, who is that necromancer we killed just now, he looks quite powerful." Song Zheng asked curiously.

"His name is Serlin Kasdinov, and he used to be my magic teacher, and it was he who recommended Kel'thugad to his father who was expelled by Dalaran, but his magical talent is not good, even by virtue of his relationship with Kelthugad, he failed to become a lich, perhaps because of the failure to transform into a lich, his personality became very cruel, and he killed many servants who worked for our family." It was Illusia who spoke, and she knew a lot about it.

"That guy is Serlin Kasdinov?" Song Zheng was overjoyed, those ghosts seemed to want him to seek revenge on Serlin Kasdinov, who was known as the butcher, but now he unexpectedly completed this task that he thought was difficult to complete.

"Yes, that guy's magic is not strong, and it was completely relying on dark magic and those undead troops to suppress us." Gianna said with some resentment that she and Iluthia had been hunted down by Naserlin Kasdinov for a long time.

"I see...... Song Zheng was already sure that most of the extra experience he had gained was from this Serlin Kasdinov, and it seemed that these boss-level characters could indeed provide a large amount of experience points.

Originally, he was going to let Gianna and the others recover some of their magic, and then they would go further down the spiritual academy to find Sylvanas.

But now Song Zheng has changed his mind, and after obtaining the real 'stealth technique', he can sneak all the way down to find Sylvanas.

This should greatly reduce the risk of putting everyone in danger.

However, when he offered to enter alone, he was immediately opposed by Gianna and the others.

"This is the lair of the undead, it's too dangerous, how can I let you go alone, we will accompany you." Gianna and Catherine were both very adamant about going together, and Iluthia hesitated for a moment, but was willing to go as well.

"Don't worry, I'm just going to find Sylvanas, and then let her leave, as long as she sneaks all the way, there shouldn't be a fight, you also saw my stealth level just now, those undead will definitely not be able to find me." Song Zheng hurriedly explained.

"Yes...... It's still too dangerous for you to go alone. Gianna frowned, still unwilling to let him go alone.

"It's okay, don't I still have the invisibility ring you gave, I used it once when I passed through Stratholme before, and I can use it two more times, it will definitely not be dangerous." Song Zheng raised his finger as he spoke, wearing the invisibility ring that the real Gianna had given him before.

"Well, be careful there, we'll be waiting for you here." Gianna finally nodded.

"You don't have to wait for me, Catherine, you take them outside first, preferably back to the house where the ghosts were, and I will join you when I find Sylvanas." Song Zheng admonished.

"Okay." Catherine wasn't too adamant about that.

Song Zheng continued to enter the depths of this psychic academy with a little excitement.

As a thief, it was only then that he felt whole, and when he couldn't sneak before, he could only be called a thief at best.

"If you learn the skills of throat twisting and ambushing, it will definitely be very easy to use this stealth to kill mage-type enemies." Thinking that he had sneaked in front of Gianna's eyes before he was discovered, Song Zheng quickly thought of a new way to upgrade.

In the game of Warcraft, thieves were once called the nemesis of the legal profession, and this is definitely not for nothing.

In this real world, the lethality of sneak attacks is far stronger than in the game, as long as the opponent does not open the magic shield in advance, there is a chance to kill with a single sword, just like when he was at Dunhold Castle, he took out the powerful cursed church mage with one sword. 21010