It could be drowning, as the story is set on a river. Maybe the character was boating and something went wrong.
Another possibility is murder. There could be a conflict among the locals or someone with a grudge against the victim. The Indian River could be the perfect place to stage a murder as it might be secluded in some parts. Also, there could be some environmental factors involved, like a poisonous plant or animal near the river that caused the death.
Chapter 150, "Green Bamboo Fence and Marking Stone, Expanding Territory", is the clearest early answer because it turns Xia Chuan's situation into a concrete plot event. The setup is In the past five days, the leader has used nearly six hundred pounds..., but the pressure keeps building through Killing Yuwen Hu is probably not a difficult task anymore..
Chapter 163, "Almost Annihilated, The Mystery of Gao Yu", is the clearest early answer because it turns Intermediate Cold Beasts's situation into a concrete plot event. It opens with The Iron Refining Furnace's suppression on the deceitful monsters at... and closes on Die!" He Gang, who reached first, raised his saber high and hacked....
Chapter 158, "Preparation, Arrival", is the clearest early answer because it turns Shi Lu's situation into a concrete plot event. The chapter gives readers a real answer by opening on The crowd subconsciously looked around and found that Mu Dong and... and ending on They only knew a little about the situation with the Cold Beasts.... In story terms, the chapter closes with "They haven't been home since the night before last.
Chapter 207, "Reforming Corvée Labor, Changes in the First Year [Happy New Year!!!]", is the clearest early answer because it turns Beast Skin's situation into a concrete plot event. Early on, On the southern side of the Great Xia Valley, there is a giant.... By the end, Brother, how long have you been in Great Xia?.
Chapter 116, "Great Righteousness, Hunting Flood Dragons, Saliva [Five-in-One Mega Chapter]", is the clearest early answer because it turns Xia Hong's situation into a concrete plot event. The chapter turns that into something concrete by moving from After passing the 500-meter perimeter, Xia Hong did not immediately... to Once twenty minutes have passed, regardless of success or failure,....
Chapter 160, "The Night Has Fallen, It's Time", is the clearest early answer because it turns Luo Yuan's situation into a concrete plot event. The chapter turns that into something concrete by moving from No wonder, no wonder it's been so long, and no Cold Beasts have... to Bang..." The wooden house's east wall reverberated with another loud....
Chapter 200, "Xu An, Ten Thousand Urgent, Presenting Treasure", is the clearest early answer because Great Xia Camp gets a payoff that changes the stakes. It opens with After Xu An finished speaking, Li Hun hurriedly set the young man... and closes on And they are gathering other camps to jointly attack Great Xia?. The key payoff is that the chapter closes with ..., which gives Great Xia Camp a stronger narrative position and pushes the battle onward.
Chapter 212, "Dispute—Can't Hold It?", is the clearest early answer because it turns Cheng Ping's situation into a concrete plot event. It opens with After two years in the Beehive, Luo Ming hadn't attained elite... and closes on Big brother, what about Hong Yu?" Just as Luo Ming was about to....
Chapter 203, "Shock, Prisoner Rules, What Is Guilt? (Part 3)", is the clearest early answer because it turns Twin Dragon Valley's situation into a concrete plot event. It opens with The Mountain River Team, thanks to those forty-odd prisoners, not... and closes on For you risking your life to bring us information, both I and the....
Chapter 195, "Jade Bone, Conclusion, Cultivation Dilemma", is the clearest early answer because it turns Twelve Manes's situation into a concrete plot event. The setup is After Snow Mane's bone was severed, a thick smoke billowed out, but..., but the pressure keeps building through Once the bone was cut, Snow Mane's right forelimb was connected to....