After listening to Vivian's words, Lu Chen understood at that time that skills can be upgraded through training, and potential points can make skills save the process of perception.

At that time, in the face of Vivian's ridicule, Lu Chen didn't say anything, but shrugged his shoulders and signaled her to continue, Lu Chen would not wantonly tell his hole cards, especially in this dangerous space.

However, after listening to Vivian's explanation of skills, Lu Chen at that time had already made up his mind to learn skills, and at the same time, he had prepared a training plan for skills.

Looking at the messy ground around him, Lu Chen summed up infinitely in his heart, in the past fifteen days, Lu Chen has not relaxed for a moment, he has been conducting endless training, the monotonous repetition has made Lu Chen mentally exhausted, and the barren wilderness without a trace of people and the pain of mental exhaustion have made Lu Chen's pain unbearable.

However, the threat of death hovered over Lu Chen's head, making him dare not relax at all, he understood that only by working hard could he survive, and only by working hard could he realize his wish.

The oppression above his head and the hope in his heart made Lu Chen not be crushed, withstood the pressure, and completed the upgrade of D-level skills from one to three in a very short time, and now it was time to harvest.

With the reduction of Lu Chen's potential points, the five skills he bought at the stall, such as the earth wall, dungeon, ground thorn, gravity technique, and mud armor technique, have undergone earth-shaking changes.

Skill Name: Stone Wall

Skill Level: D Rank

Requirements: 24 spirits

Skill description: Consume 20 points of spiritual power in a place with dirt (note: spirit is an attribute value, mental power is mana, spiritual power = spiritual ×10) to recruit a stone wall to stand in front of you, resist the enemy's attack, release time 1.5 seconds, the hardness of the stone wall, height, depending on the mental power and skill level of the releaser, skills can be upgraded, now level 4, the highest level is level 7.

Cooldown: 3 minutes.

Skill Name: Stone Prison

Skill Level: D Rank

Requirements: 24 spirits

Skill description: Consume 20 points of mental power in a place with dirt to summon a cage to trap your enemy, release time 1.5 seconds, the hardness and size of the stone dungeon, depending on the mental power and skill level of the releaser, skills can be upgraded, now level 4, the highest level is level 7.

Cooldown: 3 minutes.

Skill Name: Ground Thorn

Skill Level: D Rank

Requirements: 24 spirits

Skill description: Consume 20 points of spiritual power in a place with dirt to recruit a ground thorn to attack the enemy, release time 1.5 seconds, the hardness and size of the stone wall, depending on the caster's mental power and skill level, the skill can be upgraded, now level 4, the highest level is level 7.

Cooldown: None.

Skill Name: Stone Armor

Skill Level: D Rank

Requirements: 24 spirits

Skill description: Consume 20 points of spiritual power in a place with dirt to attract a stone armor to bless the friend, the release time is 1.5 seconds, the hardness of the mud armor, the protective power, depends on the spiritual power and skill level of the releaser, the skill can be upgraded, now level 4, the highest level is level 7.

Cooldown: 3 minutes.

Skill Name: Gravity

Skill Level: D Rank

Requirements: 24 spirits

Skill description: Consumes 20 points of mental power, gravity on the specified enemy, release time 1.5 seconds, the strength of gravity, and duration depend on the caster's mental power and skill level,

Skill Branch: Anti-gravity technique, consumes 20 points of mental power, weakens the gravity of the specified item, the release time is 1.5 seconds, the size of the gravity strength is reduced, and the duration depends on the mental power and skill level of the caster, the skill can be upgraded, now level 4, the highest level is level 7.

Cooldown: 3 minutes.

The changes in the first four of these five skills are mainly due to the fact that the material of the skill has changed from ordinary soil to harder stone, which is indeed a earth-shaking change, and the change in the last skill has made Lu Chen interested, and it will change from aggravated to weakened, which made Lu Chen a little unexpected.

However, such a change can make Lu Chen's combat methods more varied, which is not a bad thing, Lu Chen was happy for a while, and he stopped paying attention to it.

Then Lu Chen's eyes were on the two B-level skills, the power of these two is indeed stronger than the other D-level, worthy of the level of B-level skills, but the upgrade is also difficult and abnormal, Lu Chen has no other way to do this, only hard training, he must train well at the end of the skill training space time, which is the core of his tactics.

However, Lu Chen's training next is not just hard training, when he first came, it was because Lu Chen needed advanced skills, and now that most of the tasks of the skills have been completed, the combat method has been initially formed, and the remaining two B-level skills have a long cooldown time, so Lu Chen has free time, and now he is going to start actual combat training.

With Lu Chen's operation, some enemies slowly appeared in the space, and these enemies attacked without saying a word when they saw Lu Chen, and when they saw the enemies that appeared, Lu Chen didn't talk nonsense, and released his skills to fight with them.

In the remaining ten days, Lu Chen faced endless enemy attacks, and the enemy also changed from weak to strong, just beginning to face the enemy's attacks, Lu Chen was very busy, after all, he had no experience of fighting at all when he lived in a stable society before.

Fortunately, the enemies in this space were all illusory, and they would disappear and disperse whenever they were about to attack Lu Chen.

This gave Lu Chen time to regroup, and Lu Chen was also glad that he could come to this skill space to train, otherwise if he encountered the enemy in the mission space, his own rush would be the way to death, and the enemy would not give him time to reflect.

In the training space, Lu Chen slowly learned to fight, and the release of skills became proficient, and he was able to seize some opportunities to make some dazzling counterattacks.

Although, the enemies set by Lu Chen slowly became stronger and more, but in the days that followed, Lu Chen became more and more relaxed, and his fighting style slowly took shape, fighting against all kinds of enemies, Lu Chen became more and more proficient in mastering his skills, and he also knew what kind of skills to put in the battle, although all this still needs to be tested in actual combat.

Another happy event is that when Lu Chen was about to leave the space, his two B-level skills were finally upgraded to level three, in this regard, Lu Chen couldn't wait to use two potential points to upgrade these two skills to level four, and in the next fifteen days, Lu Chen released these two skills as soon as the skills cooled down.

The arduous release coupled with the excellent talent, of course, in the end, what is needed is the fast training of the skill proficiency of the first three levels, but no matter what, it is finally successful now, although it took Lu Chen a lot of time, but the upgraded attributes of these two skills made Lu Chen understand that his expectations were not in vain, and the upgraded two skills are worthy of the level of B-level.

Earth Element:

Strength: 38

System: 45

Dexterity: 14

The skill duration is 2 hours, and the cooldown is 3 hours.

Skill:

Petrified Body: The whole body of the earth element is made of earth, the health is increased by 200, there is no vital point, it is not attacked by vital points, the damage of sharp weapons is offset by 50%, the damage bonus of heavy weapons is 20%, the earth element has no mental power, and the charm it is subjected to, the spiritual impact will be resisted, and if it cannot be resisted, the earth element will be destroyed.

Gift of the Earth: Born from the earth, he is protected by the earth, and fighting on the ground will negate 20% of the damage, and his recovery speed on the ground will be increased by 200% when he is protected by the earth, and his recovery speed will be increased by 500% when buried in the ground.

Earth Shock: Earth Elemental stomps the ground with its foot, inflicting a shockwave around it, stunning enemies for 2 seconds and dealing damage of equal force.

Earth Rush: Earth Elemental rushes at enemies at breakneck speed, dealing ×2 Power DMG and stunning enemies for 2 seconds.

Skill Name: Magnetic Shield

Skill Level: B-level

Skill Required: 40 Spirit

Skill description: Consume 80 points of mental power, form a magnetic spherical shield, protect yourself or allies from damage, have a strong protection ability against energy attacks, physical attacks, and double the protection ability against metal weapons, the protection ability is proportional to the user's mental power, the duration is 5 minutes, the cooldown time is 20 minutes, this skill can be upgraded, the highest level is level 10.

Special ability: The space under the magnetic shield is affected by the distorted light of magnetic radiation, and will be invisible, and the probability of being detected by the enemy is determined by the enemy's perception and the perception and skill level of the releaser, and the smell and heat of the contractor will be hidden in the magnetic shield, which is not easy for people and enemies to observe. (Note: The magnetic shield only affects the line of sight and has no effect on sound propagation.) ）

Special ability: Magnetic blasting, after the protection of the magnetic shield is broken, it will release a magnetic impact** to open all things around you, and cause damage to it with mental power ×2, and the releaser can also take the initiative to release it to push away the enemies around you.

After upgrading, the earth element of such an attribute is already comparable to some veterans, not a loss of B-level skills, although it has the weakness of slow speed, but the three-meter-tall body makes his attack range huge, plus Lu Chen's assistance, it can already be regarded as an important combat power, which is also the core of Lu Chen's combat attack.

The magnetic shield is another core of Lu Chen, mainly to ensure Lu Chen's own safety, Lu Chen in the stealth state will be difficult to find, even if it is discovered, when the shield is also in danger, you can also use magnetic blasting to blow up the enemy, buy yourself more time, with the cooperation of other skills, although the current Lu Chen is not necessarily the opponent of the veteran, but he already has the power to fight.

However, the earth element upgraded, one thing made Lu Chen cry and laugh a little, the upgraded earth element is indeed more powerful, and it lives up to his B-level skill level, but its demand has also increased accordingly, the fourth-level earth element needs 44 points of spirit to use, and now Lu Chen only has 42 points of spirit (27+3+4+8).