Douluo: The Op-Op Fruit, skilled at researching them

"Do you even know what a Devil Fruit worth the life of a Pirate King means?"
Due to an unexpected stroke of luck, Luo transmigrated to the world of Douluo Continent, where his awakened martial soul turned out to be a rusty katana.
Fortunately, he also acquired the power of the Op-Op Fruit from One Piece along with him.
Using the power of the Op-Op Fruit, Luo removed the 100,000-year-old spirit ring and spirit bone from Xiao Wu's body, successfully improving the quality of his martial spirit and transplanting another martial spirit...
"Don't run away, Qian Renxue. Let me examine your Six-Winged Angel Martial Soul!"
"Bibi Dong, your Death Spider Emperor Martial Soul is quite interesting. Come here and let me examine your body!"
"Zhu Zhuqing, your martial spirit is sick. Come here and let me treat it for you!"
"You audacious monster! I can tell you're not human at first glance! Cooperate with me to examine your body, and I won't reveal your secret—that you're a soul beast, Xiao Wu!"
"Ah Yin, your Blue Silver Emperor Martial Soul is pretty good! It's mine now!"
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