Spell Proving Ground.

Richard stood still, looking at the many humanoid metal targets in the middle of the field.

His eyes twinkled, his hands raised, his lips opened and closed, and he whispered a mantra.

After a long time, Richard's hand shook, and a small particle of spell salt flew out, quickly flying towards the smallest humanoid metal target, followed by a spell barrage of nearly ten "single-ring explosion" sparks.

"Whew!"

The speed of the spell barrage, slightly faster than the spell salt particles, catches up with the spell salt and crashes into the metal target to explode, and the power of the spell salt and spell barrage are released at the same time.

"Boom!"

With a roar, the entire humanoid metal target was blown up.

Richard looked at the results, and his expression did not change, because just an ordinary humanoid target did not mean anything at all, and he still needed to continue testing.

Richard tilted his head and looked at the other target that was one size larger next to him, and released spell salts and spell barrage to attack.

"Boom!"

There is no doubt that the second metal target is also boneless.

Then came the third, fourth, and fifth humanoid metal targets......

The targets were bigger than the other, and each stronger than the other, but none of them survived the attack......

Eventually, Richard looked at a hill-like target in the distance in the spell testing ground.

The target was not humanoid, but a cuboid, a ridiculously thick iron wall cast into the ground. Don't talk about the first-ring spells, even the second-ring spells can't necessarily be destroyed.

The reason why Richard spent a lot of money to build this iron wall target was not to destroy it at all, but to see how much damage it could take.

So to what extent can it be destroyed?

Richard raised his hand, and a large amount of crystalline spell salt flew out first, quickly attaching to the surface of the iron wall, and then released a spell barrage composed of dozens of sparks.

"Whew!"

The spell barrage quickly swept through the air, hitting the spell salt, causing a large explosion in an instant.

With a "boom", the entire ground shook violently, and a powerful wave of air rose out, and the shock wave spread, sweeping through everything like a violent wind.

The shock wave passed through Richard's body, pressing Richard's clothes against the surface of his body, and it took half an hour for Richard's clothes to recover.

Richard vaguely heard a "bang" sound similar to broken glass behind him, didn't take it seriously, raised his eyebrows, and walked towards the target of the attack to check the details.

Walking up to his target, feeling the scorching air, Richard narrowed his eyes and looked into the middle of the iron wall.

As expected, although the iron wall was extremely badly damaged, it was not blown through. In this case, the attack power is equivalent to the level of the two-ring spell - a very ordinary two-ring spell.

Is that really the case?

"Da Da Da ......"

Richard stepped behind the iron wall.

I saw that the explosion just now, although it did not blow through the iron wall, it caused the terrible damage behind the iron wall, and some iron pieces peeled off and flew out.

Several humanoid metal targets of normal size stood behind the iron wall, and after being hit by the flying iron blocks, they were badly twisted, like monsters killed in spasms.

This is the true power of the spell just now - it may not be able to completely penetrate the defenses of the iron wall, but it can attack the target behind the iron wall.

The reason for this is that the principle of armor fragmentation is similar to that of modern earth.

Armor fragmentation is a special ammunition invented during the First World War, and has since been widely used against strong warships, homogeneously armored main battle tanks, or permanent reinforced concrete fortifications.

Armor fragmentation does not rely on a simple impact explosion to produce damage, and its shell is thin and contains a large amount of plastic explosive. As long as the armor fragmentation bullet hits the target, the thin shell will quickly shatter under the action of the huge impact force, and the built-in plastic explosive is released, which sticks tightly to the surface of the target like a plaster.

After that, the delay fuze plays a role, detonating all the plastic explosives, and the shock wave generated in an instant is hundreds of thousands of times, or even hundreds of thousands of times the atmospheric pressure, acting on the surface of the target, so that the huge destructive force is transmitted along the surface of the target to the inside, generating a compressive stress wave.

When the stress wave propagates to the free surface of the target (the back side of the target), a corresponding reflected tensile stress wave is generated. The reflected tensile wave propagates in the opposite direction at the same wave velocity and collides with the stress wave, interfering with each other, resulting in stress superposition.

When the stress near the free surface (the back of the target) exceeds the breaking strength limit of the target material, the free surface of the target will "click" and shatter, releasing fragments and causing damage.

In a sense, it's like a kind of "fighting cattle across the mountains".

Considering this characteristic of the armor shattering bullet, Richard used spell salt as a plastic explosive in the attack just now, causing a stronger shock wave and generating more power.

It's entirely conceivable that in the middle of a fight, a wizard-level enemy would take on this attack with a hard shield that they thought would not be broken. Before the shield could be destroyed, the man fell—unguarded, unsightly.

Of course, if the opponent is a soft, elastic shield, it will be difficult for this method to be effective. However, in general, the defense of soft, elastic shields is weaker than that of hard shields, and can be solved by relying solely on spell salts and spell barrages, rather than relying on the principle of armor shattering bullets.

Richard thought about this and continued to test.

Protect your body with an air shield to prevent damage from shards, and keep blasting at the rest of the iron wall, mastering the attack style of spell salt.

"Boom, boom......"

The sound was bursting, and the shock waves swept past the spell test ground one after another, spreading in all directions, and there was a faint sound of "bang-la-hula" glass breaking.

......

It's been a long time.

After Richard finished the test, he had a very detailed understanding of all aspects of the properties, data, and application of the spell salt. Stepping out of the spell testing ground, he walked back to the main lab, ready to record everything he had learned.

But as soon as he pushed the door and walked in, Richard felt that something was wrong under his feet.

Well?

As soon as he looked down, Richard saw that the ...... of the place Cullet.

Cullet?

"Hmm......"

Richard suddenly understood what was going on with the faint sound of glass shattering when he was testing the spell salt just now.

Obviously, because of the continuous explosion for a long time, the vibration, air waves, and sound waves generated caused some glass containers in the laboratory that were not stable to fall down and break. There are also some glass containers, which are not of good quality, and they may explode on their own, be stimulated, and naturally shatter.

Richard took a quick glance at the lab and saw that the situation was acceptable: the broken glass containers were not very important, and a few days would be needed to replenish a batch from Alex.

But......

Richard raised an eyebrow and looked at Pandora standing in the corner.

In other words, what do you want to do with this happy face?