The black energy wrapped around the demon shark's arm and finally appeared on the serrated broadsword.

Katsa,

The big tree as thick as a bucket was easily knocked down by the demon shark.

"Good guy, you can use black energy."

"It's a bit awesome."

Levi was shocked.

Try to make the Demon Shark perform more combat moves.

After playing like this for more than ten minutes.

Levi has almost completely learned how to control the magic shark.

He found that the combat effectiveness of the demon shark was indeed much weaker than before.

But he is still much stronger than the peak knight, and he can barely be considered a great knight in terms of combat power.

Li Wei conducted experiments on himself and found that the Demon Shark was actually fighting more and more with him. If he didn't use those sure-kill cards, the Demon Shark would still be very strong.

"Very good, my combat power has increased again, although it is an external force."

Levi was very excited. With the help of the Demon Shark, his strength has reached a higher level. Although the Demon Shark is only half as strong as a knight, he is definitely a loyal puppet.

For Li Wei, this is much easier to use than a subordinate of a great knight.

After all, the great knight's subordinates may betray him.

But the magic shark won’t!

After finishing all this, he looked at his proficiency panel.

Sure enough, a new skill appeared.

Levi————

Seal of Hell: Level 1 5/1000

…

"Hey, the third seal finally appears on the proficiency panel. No, I only cast the spell once. Why has the skill proficiency increased so much?"

Judging from Li Wei's research on the Seal of Flame and the Seal of Protection, casting a spell once increases one point of proficiency and is unstoppable. This is completely different from practicing breathing techniques.

Until Li Wei saw the line of prompts below the proficiency panel:

[Seal of Hell Proficiency 1]

[Seal of Hell Proficiency 1]

[Seal of Hell Proficiency 1]

…

Suddenly, Levi understood something.

He only needs to continuously control the "Magic Shark" with his handprints for a long enough battle.

The proficiency of the Seal of Hell will increase by 1 point.

"Then this skill will be quick to use."

"It's just that the energy stored in each undead core is limited. Every time the demon shark fights, it needs to consume a lot of energy from the undead core, so there is still a limit."

Levi asked the magic shark to stop, and then he made a closing hand seal.

The undead core in the demon shark's eye socket appeared again in Levi's hand.

Levi took a look and found that one-twentieth of the energy of the Undead Core had been used.

"In other words, if all the energy of an undead core is used up, it can only increase the proficiency of the Seal of Hell by 100. It takes 10 such undead cores to advance to the second level? Where the hell am I going to find such an undead core?

, is it possible to go to the far north to kill the snow demon in person?"

Li Wei no longer dared to play casually.

"Perhaps the quality of this undead core is too low."

According to the handbook, the stronger the undead are, the higher the quality of the undead core that is born.

Li Wei injected the core of the undead into the body of the demon shark.

This time he didn't let the demon shark use his black energy to fight, but just let him follow him around.

Levi's research found that if there is no fighting, it is just ordinary driving.

The Demon Shark consumes very little energy from the Undead Core.

According to this consumption rate, only about 1% of energy is consumed per day.

"I understand, the core of the undead is a battery, actions like walking are standby, and fighting is a game that consumes electricity."

Levi gradually understood the principle of this undead core.

This put him at ease. He had been worried that the magic shark would use a lot of energy to walk, so the mark of hell would be too useless.

He couldn't just make a big coffin to put the magic shark in and carry it around every day.

Li Wei used the materials prepared in advance to put makeup on the demon shark, and at the same time masked the smell of corpses on the demon shark. Then he made the demon shark wear his own armor, an iron helmet, and a sawtooth on his back.

Giant Sword, follow him and return to Icewind City under the cover of night.

The next day, Levi found a place to recast the highly recognizable serrated broadsword into a normal giant sword.

He also personally customized a set of fully armed armor for the Demon Shark.

The entire figure of the Demon Shark is hidden by armor, coupled with the airtight iron helmet, so that others will not easily notice his strangeness.
Chapter completed!