Well, a really interesting plot could involve Percy being the only demigod with the bloodbending ability. This sets him apart from his peers and makes him a target. The gods might be wary of him having such a powerful and somewhat 'dark' ability. Or perhaps Percy has to use bloodbending to save someone he loves from a curse that can only be broken through this power. He would have to grapple with the moral implications of using it in the process. There could also be a plot where Percy is tricked into using bloodbending against his friends, and then has to find a way to reverse the damage.
One plot idea could be Percy discovering he has the ability to bloodbend and struggling to control it. He might be afraid of the power and how it goes against his usual water - based abilities. Another could be Percy having to face an enemy who uses bloodbending in a malicious way, and he has to learn it quickly to defend himself and his friends.
Chapter 152, "A Man of Many Talents and Wealth Draws People Near", is the clearest early answer because it turns Man's situation into a concrete plot event. Early on, While most of the villagers of Chixia Village were gathered at the....
Chapter 461, "Team Q Established!", is the clearest early answer because it turns Team's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Bai Lu cried while recounting her ordeal to Jiang Li.
Chapter 206, "Miss Su, Thank You So Much!", is the clearest early answer because it turns Life Plate's situation into a concrete plot event. The chapter gives readers a real answer by opening on Five minutes later, Xingxing led Ah Fu out of the room by the hand.
Chapter 207, "Keep these thirty points for yourself, I don't need them", is the clearest early answer because it turns Sister's situation into a concrete plot event. It opens with After finishing, Sister-in-law Lan quickly took out the Good...
Chapter 435, "A Skilled Housewife Can't Cook Without Rice", is the clearest early answer because the violence around Pei Ye becomes final instead of hypothetical. The chapter turns that into something concrete by moving from The elderly dean looked at Zhao Lang with a tinge of regret.
Chapter 407, "Is this person here for a vacation or for survival?", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event.
Chapter 102, "The production team can't take a joke!", is the clearest early answer because it turns Su Yinwan's situation into a concrete plot event. The chapter turns that into something concrete by moving from When the camera cut back, the three of them had already returned to...
Chapter 321, ""Great Benefactor" is Jiang Li?!", is the clearest early answer because it turns Mrs's situation into a concrete plot event. It opens with Several people thus settled down in the living room, and the servants...
Chapter 426, "How Did Someone Fall Down?!", is the clearest early answer because it turns Youth Trainee's situation into a concrete plot event. The chapter gives readers a real answer by opening on Isn't this a bit too risky..." Liu Qian, standing out of the camera's...