Half a month later.

During this period, Duke consumed a large amount of Basic Magic Recovery Potions, constantly replenishing his magic power and continuously honing the proficiency of four Earth Magic spells.

With the assistance of the Yellow Sand Crystal, each time he cast an Earth Magic spell, the magic power consumed was greatly reduced, thereby accelerating the progress of grinding proficiency.

The spells Rock Armor, Rock Spike, and Petrification Skin finally reached max level, providing three free attribute points and introducing three new traits.

[Rock Armor: LV5 (Trait: Diamond Hardness)]

[Petrification Skin: LV5 (Trait: Petrification Permanence)]

[Rock Spike: LV5 (Trait: Rock Bomb)]

[Diamond Hardness: Greatly enhances the defensive capability of the Rock Armor you cast]

[Petrification Permanence: Petrification Skin becomes a permanent spell and does not affect the nature of the flesh]

[Rock Bomb: The Rock Spike you cast gains explosive properties]

Duke organized the feedback from the Skill Tree and conducted experimental tests on each of these traits.

First was Rock Armor, whose Diamond Hardness trait effect was very direct, significantly enhancing the defense strength of Rock Armor.

Duke's original Rock Armor defense strength was only seven or eight degrees, but now with the trait, it directly increased to fifteen degrees, doubling in strength.

After casting, the surrounding yellow sand gathered around him, forming a set of Rock Armor on his body.

However, its appearance had changed greatly; now the Rock Armor had transformed into the shape of diamonds.

Duke's entire body was covered in sparkling diamonds, crystal clear.

"This is too flashy!" Duke was speechless as he looked at his reflection in the mirror.

The original Rock Armor was earth-yellow, very simple.

Now it had directly become Diamond Armor, somewhat too dazzling.

Although the defense capability had improved, the target had also become more conspicuous.

Duke couldn't change the trait, so he would have to use this spell judiciously in the future.

For example, when he was being chased by the Lizardman Leader last time, it was best not to use this spell; otherwise, the target would be too conspicuous.

Next was the Petrification Skin spell, whose trait is Petrification Permanence.

Simply put, Duke no longer needs to spend magic power to actively use Petrification Skin, as his body automatically possesses the ability.

The original Petrification Skin strength was only three or four degrees, now it has nearly seven degrees of strength.

Moreover, it is a passive ability; Duke's body will always be protected by Petrification Skin, and the flesh feels completely unlike the previous texture of Petrification Skin, no different from its normal form.

Duke calculated that the strength of the Shadow Water covering his body is twelve degrees, with the Petrification Skin's seven degrees, his permanent defense has two layers of protection.

However, this defense strength is not twelve plus seven; it can only be calculated as twelve degrees.

Because energy capable of penetrating twelve degrees won't weaken much when reaching the layer of Petrification Skin.

For ordinary spells of Wizard Apprentices, Duke now possesses extremely strong defense; even if hit by a few Fireballs, he can remain unscathed.

The permanence trait of Petrification Skin is very similar to many wizards' body modifications; many wizards conduct experiments to modify their bodies, enhancing their capabilities.

The most advanced field among these methods is bloodline modification; if done well, the bloodline can even be passed down to descendants, which is how many Wizard Clans are born.

Wizard Clans have been optimizing their bloodlines through the efforts of many generations of wizards, making the bloodline power increasingly strong.

The Petrification Skin Duke has is akin to such effects, except his body's essence hasn't changed, it's only the Skill Tree traits that have achieved this effect.

That means this is a power that can't be passed on through bloodline.

Even if Duke had descendants, they wouldn't possess the permanence trait of Petrification Skin, as it's a trait unique to Duke himself.

After testing the Petrification Skin, Duke began researching the Rock Spike spell.

Rock Spike's trait is Rock Bomb; originally, Rock Spike was just a magic-infused Earth Element spell, only six or seven degrees in strength.

But now Rock Spike has greatly transformed, becoming a Rock Bomb, with the explosive energy released reaching sixteen degrees.

Such energy strength is considered quite high; Duke needs to maintain a safe distance when using it, or else he'd be affected by the explosive energy.

The strength of Rock Spike is now on par with that of the Water Arrow Technique, becoming another powerful weapon in Duke's arsenal.

Duke no longer needs to buy Magma Bombs, as casually throwing out a Rock Spike is stronger than a Magma Bomb.

For Wizard Apprentices, such spell techniques are extremely powerful.

If Duke encounters Bell again, even if Bell is in the form of bloodline power, Duke would handle it much more easily.

After testing the data of these three spells, Duke focused on the last Earth Magic spell, Gravity Slowdown.

[Gravity Slowdown: LV4 (156/200)]

Due to not being able to complete Gravity Slowdown with yellow sand from the Yellow Sand Crystal, the magic power consumption remained high, resulting in slow proficiency progression.

The Gravity Slowdown spell requires communication with the surrounding land and completion with underground Earth Elements.

This is a range-type spell, causing Duke's internal magic power to deplete rapidly.

Even after spending considerable time grinding over the past half month, it still hasn't reached max level.

After maxing out the other three spells, Duke can then concentrate fully on maxing out Gravity Slowdown.

He drank a Basic Magic Recovery Potion and started casting Gravity Slowdown.

...

Two days later.

[Gravity Slowdown level increased, Spirit +0.2, free attribute points +1]

[Gravity Slowdown: LV5 (Trait: Gravity Manipulation)]

[Gravity Manipulation: You can now control gravity more precisely]

Duke experienced it and found this trait very useful.

As the name Gravity Manipulation implies, Duke can now precisely control the size and multiple of gravity displacement range.

Previously, when casting this spell, a gravity field would be released directly, with a range that couldn't be reduced to a smaller size, resulting in high magic consumption.

But now Duke can precisely control it to a range as thin as a needle, consuming much less magic power.

Moreover, Duke discovered some other ingenious uses.

He could adjust his own gravity to be very low, allowing him to float gently with a leap, and with practice, he could eventually float in the air directly.

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