The art of Imitation, born from [False is also True] and the profound understanding of Da Xuan's ancient protective Immortal Array [Nine-star Red Beads], is most likely an ability that only Li Fan could wield in this world.
Imitated Heavenly Pattern does not truly possess its own consciousness, it simply operates mechanically, obeying the commands of its creator with ease and precision.
More importantly, there are thousands of Small Worlds in the Xuanhuang World. If one were to use the original Soul-sealing Replacement technique, simply finding a Cultivator's Divine Soul with sufficient strength to match the Heavenly Dao Consciousness of various worlds would take considerable effort. Now, Li Fan could solve this problem on his own.
And even if the number of Small Worlds he controlled increased, there would be no worry of them becoming uncontrollable.
