Sure. There are fanfics where a young wizard who joins a dark wizarding group in search of power experiences 'dark reprussucions'. He might start to lose his ability to perform normal magic and instead can only use dark magic that gradually consumes him. His appearance might change, becoming more gaunt and his eyes might take on a sinister glint. Also, his relationships with his family and former friends are completely destroyed as they see the change in him.
One example is in a fanfic where a character uses a dark spell to control others. The 'dark reprussucions' are that he gradually loses his own free will as the dark magic starts to control him instead. He becomes a puppet of the very power he sought to wield. Additionally, the magical community starts to sense the dark taint around him and he is shunned, losing his status and any chance of a normal life within the wizarding world.
Chapter 510, "The Fake Young Master", is the clearest early answer because it turns Gu Mansion's situation into a concrete plot event. The chapter gives readers a real answer by opening on Ever since that night's family banquet, Gu Qiang hadn't slept soundly...
Chapter 515, "You actually kidnapped a man?!", is the clearest early answer because it turns Team's situation into a concrete plot event. Early on, After Miss Su Yinwan left in a huff, Shang Shuyue's mood greatly....
Chapter 293, "Hello Lei Ting, I am Chui'er Tuttu", is the clearest early answer because it turns Shi Xu's situation into a concrete plot event.
Chapter 521, "Stick to One Line of Work", is the clearest early answer because it turns Of's situation into a concrete plot event.
Chapter 367, "Help Me Call the Police", is the clearest early answer because it turns Chixia Village's situation into a concrete plot event.
Chapter 346, "This person doesn't seem to like her very much", is the clearest early answer because it turns Assistant Ge's situation into a concrete plot event. The chapter turns that into something concrete by moving from Yes," Jiang Li said, "I learned that this 'Night Walk' is an...
Chapter 379, "Is This the Way Huaxiu Treats Its Guests?", is the clearest early answer because it turns Madam's situation into a concrete plot event.
Chapter 162, "Jiang - Boyfriend Power Explodes - Li", is the clearest early answer because it turns Boyfriend Power Explodes's situation into a concrete plot event. The chapter turns that into something concrete by moving from He Yun then realized what was happening and subconsciously wanted to...
Chapter 532, "Little Lolita Beats Up Jungle Python?!", is the clearest early answer because it turns Zhao Lang's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Outside the cave, the four people grasped their weapons tightly and...
Chapter 437, "A Gentleman's Revenge is Not Too Late Even After Ten Years!", is the clearest early answer because it turns Shang Shuyue's situation into a concrete plot event.