The fruit of the Tree of Pearls promised by the clouds and thunder was rewarded in full. The pen "Fun" Pavilion www.biquge.info benefited many people. For a while, the ghosts were thundering. In a corner of Yunlei's private planet, a group of ghosts danced wildly, and the overall atmosphere was like a nightclub.

After the thousands of ghosts under Yun Lei learned this Yin Thunder Technique, Yun Lei began to study tactics suitable for the application of Yin Thunder with the Red Lady. Similar to what Yun Lei originally expected, after the ordinary Yin Soldier learned this Yin Thunder in the foundation building period, its effective killing distance was about one thousand meters. This data has completely surpassed the vast majority of firearms in the human world.

And the ghost creatures in the Dan period, after practicing these Yin Thunders, the Yin Thunder launched by them has a longer range and greater power. If the power of the Yin Thunder thrown by the ghosts in the Foundation Building Period is equivalent to the high-end firearms in the human world, then the power of the Yin Thunder thrown by the ghosts in the Yudan Period can be comparable to some artillery.

Therefore, the Yin soldiers under Yun Lei quickly transitioned from the era of cold weapons to the era of "hot weapons". The various infantry arrays that were originally complicated and required extremely high command skills, such as the famous "One Word Long Snake Formation", were naturally eliminated.

Without Yun Lei's persuasion, the Red Lady and Liu Laosan, who had rich combat experience, directly turned the array practiced by their Yin soldiers into the three-stage attack they chose when humans began to use flintlock pistols on a large scale.

After all, although this Yin Thunder Technique was powerful, it was also extremely expensive. Ordinary ghost creatures in the foundation building period, after launching a yin thunder, always need a moment of pranayama before they can launch a second yin thunder. Moreover, if you don't want your own cultivation to be damaged, then launching more than a dozen yin thunders one after another is already the limit.

Of course, if it is really a fight, using the method of depleting one's own cultivation and using Yin spiritual power, then this amount can be doubled.

After all the Yin soldiers have mastered the art of Yin Thunder and have initially mastered the array of three-stage strikes. Yun Lei asked the Red Lady to command these thousands of Yin soldiers to aim at the hills that were formed after the formation of this planet. Perform a rotational attack. The Red Lady and other monks in the Dan period also attacked with all their strength and attacked with the technique of Yin Thunder.

As a result, under the continuous artillery fire and thunder, the hill, which was originally hundreds of meters above sea level, was razed to the ground in just a few moments. The spiritual power of the thousands of Yin soldiers who were waiting for the foundation building period was exhausted, and the hill, which was not too high, had turned into a huge hole. And there are no whole stones left in the pit, only gravel and sand remain.

Such Yin soldiers are compared to the Yin soldiers under the Ghost King Zhukong Xiang, just as the army of Europa in the mid-nineteenth century was compared with the army of the former Qing Dynasty in China.

Although in some respects, it is still slightly inferior, but when it comes to combat effectiveness, it is no longer a level of existence at all. At that time, several countries in Europa only gathered a few thousand musketeers and some artillery pieces to forcibly open the gate of China and drive straight in. Even, Mingjing, the capital of China, has been broken again and again.

Come to think of it, if it takes time to train these Yin soldiers who have mastered the art of Yin and Thunder, then it is not impossible for Yun Lei to use these thousands of Yin soldiers to break through the Ghost King's empty capital. Moreover, such a Yin soldier is not the strongest Yin soldier in Yun Lei's mind.

Today's Yin soldiers are still too slow to move. As an army, completely unqualified. In addition to long-range attack weapons, a modern army also needs to have strong mobility capabilities. That's why equipment such as tanks and armored vehicles has become so important.

Of course, in addition to the ability to maneuver, because immortal cultivators are different from mortals, even if their cultivation is not enough, they can also glide at a low altitude, or stay in the air for a short time with the help of magic weapons. Therefore, it is also important to have air supremacy. At the very least, there should be an air escort. Don't let other immortal cultivators sneak up on it.

This is exactly the military thinking that has been used since the time of World War I, but has not been eliminated to this day - aircraft can only play its maximum role when it cooperates with ground forces.

Of course, World War II proved that the emergence of strategic bombers raised aircraft and air supremacy to a strategic height, and the strategic bombing of Dongying by the Mayflower Federation caused Dongying's economic system to collapse rapidly. Although it is said that there is no special economic system at all in the capital of the Void Phase, if the timing is right, it is not impossible for Yun Lei to give the Ghost King the Void Phase's strategic bombardment.

According to his calculations, these nine Gu Yu Birds only need to improve their cultivation slightly, and their flight speed can surpass that of ordinary Yuan Infant Stage cultivators. If you can raise your cultivation to the stage of knotting, you will definitely be able to escape after being caught off guard by the Ghost King's Empty Phase. Even if it's head-on, there won't be much danger.

Therefore, these nine birds have to undertake a variety of tasks at the same time, such as strategic bombing, tactical bombing, reconnaissance, and combat.

Therefore, Yun Lei paid more attention to the training of the nine Gu Yu Birds than to the training of ordinary Yin soldiers! Yun Lei began to plan to train these nine Gu Yu birds.

According to Yun Lei's idea, if these nine Gu Yu Birds want to come in handy, they must make some difficult moves unique to fighter jets. For example, rapid turning, Inmaiman maneuvering, barrel rolling maneuvering, cobra maneuvering, scissor flying, high yoyo and low yoyo, etc.

According to Yun Lei's thoughts, these flight maneuvers are not top pilots, and after long-term training, they can't do them at all. For example, the Inmaiman maneuver is to change the habitual horizontal maneuver of circling left and right to dive, pull up the nose and somersault, and when it reaches the top, it rolls half a circle, from an inverted flight state to a level flight state.

At many air shows, these fancy maneuvers can make the palms of the audience pinch a cold sweat. In a real battle, these complex movements will conjure up more complex and maneuverable movement routes, making it difficult to hit both the ground anti-aircraft artillery fire and the opponent's fighter jets.

According to Yun Lei's estimate, just the flight maneuvers of these fighters that he knew would require a long period of training. However, this is how fast Gu Bird mastered these flight movements, far beyond Yun Lei's expectations.

Originally, for human pilots and airplanes, it required complex mechanical operations and accurate action calculations to complete the flight maneuvers, but for these nine four-winged birds, they could easily do it with just a little adjustment of the angle of their wings during flight.

Moreover, these nine Gu Yu birds were inspired by Yun Lei. From the original instinctive flight state, they realized that they can actually have many ways to fly.