In a 'Harry Potter has a metal arm' fanfiction, the plot could start with Harry being experimented on by a rogue group of wizards who are trying to combine magic and Muggle technology. The metal arm gives him the ability to communicate with magical creatures in a unique way. He then uses this newfound ability to gather an army of magical creatures to fight against Voldemort. Along the way, he has to overcome the doubts of his friends who are initially skeptical about his new - found powers and the metal arm.
One possible plot could be that Harry gets his metal arm during a battle with Death Eaters. The arm could be magically enhanced, with runes inscribed on it that give him new abilities like being able to sense dark magic from a distance. He then has to learn to control these new powers while also dealing with the prejudice from some in the wizarding world who see his metal arm as something 'unnatural' in a magical setting.
Chapter 663, "How Did These Two Start Fighting?!", is the clearest early answer because the buildup finally cashes out in a real clash. The chapter turns that into something concrete by moving from Jiang Shixu received the message in daylight the next day.
Chapter 847, "How Else Can You Argue?!", is the clearest early answer because it turns Gu Qiang's situation into a concrete plot event. A useful checkpoint is the way the scene starts with The Rong family couple watched the situation unfold, exchanged a...
Chapter 941, "In Which Year Did the River Moon First Shine on People [Extra · River Moon Edition]", is the clearest early answer because it turns People's situation into a concrete plot event. It opens with This is the fifth day since getting rid of Jiang Yan.
Chapter 653, "Everyone's Champion", is the clearest early answer because it turns Wilderness Survival's situation into a concrete plot event. It opens with As dawn broke, "Wilderness Survival 30 Days" released a notice on...
Chapter 610, "Building a House?!", is the clearest early answer because it turns Jiang Cheng's situation into a concrete plot event. The chapter turns that into something concrete by moving from Therefore, Jiang Yan became even more entitled and bossily ordered...
Chapter 738, "Here to Fight!", is the clearest early answer because the buildup finally cashes out in a real clash. A useful checkpoint is the way the scene starts with Feeling that something was amiss, he immediately called Jiang Li.
Chapter 743, "They Have Already Been Released", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Too many people caused a commotion at Fang Family's place tonight,...
Chapter 531, "She Really is a Remarkable Person", is the clearest early answer because it turns Pei Ye's situation into a concrete plot event.
Chapter 779, "Unmarried but Have a Daughter?!", is the clearest early answer because it turns Chen Qijun's situation into a concrete plot event. The chapter turns that into something concrete by moving from Right, there's one more important thing," Shen Lan looked at Chen...
Chapter 685, "Defense Value Skyrockets!", is the clearest early answer because it turns Wu's situation into a concrete plot event.