The reason why humans wanted to develop it was because there was an ore that humans needed on this planet, Mithril!
This Mithril was not quite the same as the Mithril in the lower realm. The Mithril in the lower realm was a kind of anti-magic material that mages did not need to use. However, the Mithril in the realm of arrays was a different kind of material. Not only could mages use it, but they could not do without it.
The Mithril in the realm of arrays was a kind of energy-conducting material. Whether it was magic power, battle energy, or Origin Energy, it could conduct them very well. Therefore, whether it was the use of magic staffs or the weapons made by Warriors, they could not do without Mithril.
