PREVIEW

... f has very unique characteristics, and the side effects basically affect the user."

 Keranmu's evil sword, judging from this, the side effects are relatively small.

 Picking it up will only affect your thinking, always thinking about challenging difficult-to-beat goals.

And this evil sword can't tell the difference between friend and foe at all. It just kills randomly when it is unsheathed.

“How did the previous owner of this weapon use it?” Wu Heng continued to ask ...

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