This Array was called the "Gui Water Spirit Gathering Array."
Gui Water is the water of rain and dew, the water from underground. It belongs to the Yin attribute and is common in Water Element Daoist Skills.
Inside Ah Kun, Gui Water was the purest water that fell from the sky and flowed in subterranean currents—a branch of Water Element Spiritual Qi.
In other words, it was a purified version of Water Spiritual Qi.
As for how to purify it, one had to use the Gui Water Spirit Gathering Array to assist the Pet Beast in the process.
Otherwise, for a Pet Beast to comprehend this on its own would require immense Talent and Water Element Affinity.
Ah Kun's current Water Element Affinity had been ground up to an extremely high Realm through daily Attribute increases.
Gu Ming had it pay closer attention to distinguish the Water Element Spiritual Qi in the air.
