After treasures meant for killing, defense, and the like were refined by cultivators, they could naturally display their effects when activated with true essence and Mana.
But functional treasures often required special methods of control.
And these control methods were often naturally born when the treasures were successfully forged.
After being refined by a cultivator for the first time, they would naturally become known to that cultivator.
For example, the Small world space within Su Shi'er's Nine Heavens Exquisite Pagoda, and the two Spiritual Treasure Flying Swords not far away, both had formation patterns engraved upon them.
Using flying swords for slaughter was not difficult, but activating the formations and setting up a sword formation could not be done through Mana alone.
Back at the Immortal Tomb, when Su Shi'er brought Xiao Yue and the others into the Small world space, he had also passed on the control method for the Nine Heavens Exquisite Pagoda.
Without this control method, they could neither enter nor leave.
The wonder of the Xuantian Spirit Guiding Art lay in its ability to stir the spiritual essence within an unfamiliar treasure, allowing cultivators to analyze the changes in that essence and gain a chance to discern the control method of the Magical Treasure.
The green light around the Heaven and Earth Furnace had yet to fade. Forcibly interrupting it was certainly not an option.
The only way was to intervene through this treasure's own control method.
But Su Shi'er had no confidence that the Xuantian Spirit Guiding Art could stir the spiritual essence within the Heaven and Earth Furnace.
What was more, the one inside the furnace at this moment was his own true body!
One slight mistake could even bring disaster upon his true body!
Su Shi'er's brows alternately furrowed and relaxed.
At this