As Zhang Zhiliang pointed out, after studying in the Universal Academy for a while, Li Fan had a decent grasp on constructing the Tianxuan Soul Locking Array.
However, he wasn't entirely sure of the power this constructed array could wield, lacking a clear quantitative understanding of it.
Similar to a factory worker on a weapon assembly line, they might not be fully aware of the lethality of the weapons they produce.
At first, Li Fan thought the main purpose of creating the Tianxuan Soul Locking Array was to identify the monks of the Five Elders Organization who had sneaked into the territory of the Immortal Alliance.
However, after being reminded by Zhang Zhiliang, Li Fan realized that its true purpose might be much more than that.
The Tianxuan Soul Locking Array is indeed excellent at distinguishing between friend and foe.
But if its sole purpose was for this, it would be quite an overkill.