One idea could be Shepard accidentally getting thrown into a dimension where the Reapers are already victorious. They have to find a way to team up with the remnants of different species to reverse the situation. Another could be a dimension where the Mass Effect fields work differently, leading to unique biotic and tech abilities that Shepard has to learn to use in order to get back home.
A cool plot might be that a character discovers a dimension where the Protheans never died out. The story could then explore how they interact with the Protheans and how this new knowledge can be used to prevent the Reaper threat in their own dimension. Also, a dimension where all species are merged into one super - species due to some strange dimensional anomaly could be an interesting setting for a fanfiction.
A practical answer is Chapter 160, because it turns the idea into a concrete scene. The chapter opens with As the sky gradually darkened, the originally mild drizzle began to..., adds pressure through Feeling somewhat guilty, she bluffed, "I—I like her, it's none of—none of..., and ends on Then.
Chapter 186 is the strongest chapter-level answer because it starts from Seeing Wen Jiaojiao bravely entering the pigsty, Jiang Yan couldn't stay... and follows through on And in the instant she fell, the red rope tied to Jiang Yan also broke,....
A practical answer is Chapter 166, because it turns the idea into a concrete scene. The chapter opens with Only after everyone in the small courtyard had left, did Zhao Lang stride..., adds pressure through Fans can't bear to watch anymore.], and ends on However, after interviewing the villagers.
Look to Chapter 197 for the clearest answer. It begins with Seeing that no one cared about what she said, Su Yinwan immediately felt..., keeps building through Then she wanted to attract everyone's attention back, looking directly at..., and lands on Wen Jiaojiao, aren't you underestimating me?.
The best chapter pointer here is Chapter 163, "She Actually Gave President Shang a Zero?!". It opens with Su Yinwan entered a small room, guided by a staff member. and closes on Moreover, by doing so, the online viewers would think her more innocent....
Chapter 169 is the strongest chapter-level answer because it starts from Everyone: "What?!" Seeing the shocked and bewildered expressions on their... and follows through on Wen Jiaojiao, as if to prove herself to Jiang Li, rolled up her sleeves....
Look to Chapter 198 for the clearest answer. It begins with He wrapped his arms around himself and stepped back half a step, eyeing..., keeps building through Is that not okay?" Jiang Yan: "....." "Just be normal, please., and lands on How is that possible?" "Because I've calculated it, there are.
Chapter 136 is the strongest chapter-level answer because it starts from A few people retraced their steps back to the place they had just been. and follows through on Aunt Ying and the camera PD arrived soon after..
Look to Chapter 193 for the clearest answer. It begins with Jiang Shixu's eyes lit up when he heard there was a gift., keeps building through But the next second, he carefully asked, "Is this gift for everyone?" "No,..., and lands on Jiang Cheng was a prime example..
A practical answer is Chapter 211, because it turns the idea into a concrete scene. The chapter opens with Advanced Repair was even more outrageous, costing a whole 30 points., adds pressure through It's okay, I have enough points to redeem a Supreme Repair myself., and ends on A young master from.