Old Man Withered Bamboo used the Qimen Seven Extremes Formation, which was still founded on Qimen Dunjia and derived from it.
Qimen referred to the eight gates of Qimen Dunjia: Rest, Life, Injury, Obstruction, View, Death, Alarm, and Opening.
Old Man Withered Bamboo possessed a set of magic treasures: eight spirit pearls corresponding to Qian, Kan, Gen, Zhen, Xun, Li, Kun, and Dui. Of these, the Xun Spirit Pearl, belonging to Yi Wood in Xun Palace in the southeast, harmonized best with his Daoist arts and wielded the greatest power. These formed the earthly plate.
The Seven Extremes referred to the Seven Northern Dipper Stars. In truth, the Northern Dipper had nine stars, which could develop into the Seven Extremes Formation.
These were Celestial Pivot, Celestial Jade, Celestial Pearl, Celestial Balance, Jade Balance, Shaking Light, and Opening Yang, plus Left Assistant and Right Assistant, making nine stars in total. They corresponded to the nine stars of Qimen Dunjia, such as Heavenly Canopy and Heavenly Weed.
When Old Man Withered Bamboo fought others with magical arts, he usually used only the bamboo staff in his hand. At most, he brought out the Xun Spirit Pearl, and that was enough to settle the battle.
In the past, when his Primordial Spirit had flown to the Central Land to wander and reincarnate, his Physical Body had remained on Wuzhong Ridge. Aside from thirty-six stalks of taiyi azure spirit bamboo, only the Celestial Pearl Formation had guarded it.
The last time Qi Shouming came looking for him, he too had passed through the Celestial Pearl Maze Formation and the Azure Spirit Bamboo Formation before reaching him and rescuing him.
Now that he had finally witnessed Shi Feiyang's prowess, he actually found him somewhat unfathomable. He activated the entire Qimen Seven Extremes Formation at once.