"Heavenly Phenomenon Four Formation."
Tianyuan City's outskirts, atop the sprawling high mountains.
Mu Yuan held an object in his hand, murmuring softly.
In his hand, a circular semi-transparent array track slowly floated up and down in succession.
This was one of the... four major keystones of the Heavenly Phenomenon Four Formation.
"There are two ways to use the Heavenly Phenomenon Four Formation," one is similar to the Military Soul Battle Flag, which can move with the army.
The other, as it is now, is to integrate it into the mountains and the earth."
The latter, fixed in position and immovable, could exert a far greater power than the former. It could lean on the ground, draw on the power of the earth's veins, and merge with nature.
Mu Yuan naturally chose the latter.
The most urgent matter at hand was to defend against the backlash from Dragon Sleep Valley.
He was to fight a defensive battle.