Heaven Origin Continent

Mingyuan Immortal City, his residence.

His pill refining continued.

One afternoon, a soft knock came from the residence's stone door.

Li Yuan opened the door.

Xue Lang stood outside.

"Fellow Daoist Li, sorry for the intrusion." Xue Lang cupped his hands.

"Please come in, Senior Xue."

Xue Lang entered the residence, sat on a stone chair, and took a jade slip from his sleeve, placing it on the table.

"No need to call me senior. We're fellow cultivators."

"The sect is discussing a proposal to revise the fundamentals of a fourth-order array. I'd like to hear your thoughts."

"My thoughts?"

"You're a Lower Realm cultivator, and you developed your formation mastery in a Lower Realm environment. Spiritual energy concentrations differ greatly between the Upper Realm and Lower Realm, so the same array will operate differently in different environments."

Xue Lang's tone was calm and direct. "Our internal discussions lack a Lower Realm perspective. You happen to fill that gap."

Li Yuan accepted the jade slip and probed it with his divine sense.

The revision proposal concerned the spirit power distribution logic of a fourth-order defense array formation. The central problem was that its efficiency deteriorated too quickly in environments with low spiritual energy. Once the concentration fell below one-third of the Upper Realm standard, its defensive strength plunged off a cliff.

This was precisely the most common problem when transplanting Upper Realm arrays into the Lower Realm.

Upper Realm arrays were designed on the assumption that ambient spiritual energy concentrations would be extremely high. A considerable portion of their spirit power supply relied on passive replenishment from the surroundings. Once ambient spiritual energy became insufficient, passive replenishment plummeted, leaving a shortfall in the array's spirit power supply.

Li Yuan looked up after reading the revision proposal.

"The three additional sets