It had never been used before because Douluo Continent's technology had already reached a bottleneck.
As early as several thousand years ago, the Shenwu Research Institute had stopped actively developing weapons Below Level 100.
Doing so would have prevented them from improving their standards, while their thinking would gradually become rigid under the plane's restrictions.
Thus, the Soul Tools used before Douluo Continent's breakthrough could be understood as products from nearly a thousand years ago.
Although some had been invented within the past century, the overwhelming majority served only auxiliary purposes.
Very few were truly used as primary weapons.
Of course, the soldiers' armor from some time ago did not count.
After all, Xiao Tianyang had personally ordered the research institute to develop it.
Without his order, the institute would never have considered that direction at all.
But things were different now.
The rules that had bound Douluo Continent's researchers no longer existed.
Furthermore, past achievements that could not be used because of those rules could now be brought out as well.
That inevitably led to a problem.
What should they do with the military supplies they had stockpiled to resist outside invasions?
No one had expected Xiao Tianyang to elevate Douluo Continent in such a short time.
And because Xiao Tianyang had previously ordered preparations for war, the factories' assembly lines within the institute had practically never stopped.
However, Xiao Tianyang seemed to have planned for this long ago.
The details of Xiao Tianyang's method remained unclear, mainly because they had never had the opportunity to participate.
Therefore, all they could see was the result.
Large quantities of Soul Tools below Level 8 were sent into the imperial palace, only to emerge as Level Nine Soul Tools.
The most numerous among them were Level 9 Soul Tool Shells and