World Traveler Villain - Chapter 49: CH: Progress

[Urban Martial Arts, Passionate Martial World.] He was a super expert who, due to accepting an inheritance, underwent a physical transformation that put his life at risk. To extend his life, the king returned...

There was a Senior Brother and a Junior Sister. One of them was transmigrated to this world and had cheats while the other was the reincarnation of a Great Emperor.

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Finding himself in an Last Airbender without an airbender around, a transmigrator waterbender goes on an adventure to stop the worst from happening to him.