Deduction Plan: Spirit Wave Sword.

The second condition was the weapon had to be lethal. When a soldier fought with the invading races on the battlefield, the weapon had to be able to kill them with one strike or severely injure the enemy and cause unnecessary trouble.

The third concerned its range of attack. Although daggers and hunting knives were only several dozen centimeters long and very suitable for close combat, they were a bit rigid.

Those beastly creatures had extremely sharp fangs and teeth. Some of them could even spit out fire and acid. They had endless means of attack.

If the weapon's range of attack was too small, the cultivators would have to risk their lives to engage in close combat.

So, if the range of the new type of weapon could be adjusted and be more flexible, it would give the cultivators on the front line more room for utilization.

The last point, which was also the most important to Wu Mo, was to counter the Invisibility Armor.