The Dominators could be a good choice too. They are a powerful alien race. They might see both Flash and Supergirl as threats to their plans of conquest. They could use their advanced technology to neutralize Supergirl's powers and try to trap Flash in a time - loop or something similar.
Lex Luthor could be a great villain. He might be jealous of Supergirl's powers and see Flash as an obstacle in his plan to defeat her. He could use his scientific knowledge to create some sort of weapon that targets both speedsters and Kryptonians.
Reverse - Flash would also be a likely candidate. He could team up with one of Supergirl's foes, like Reactron. Together, they could cause chaos. Reverse - Flash could mess with the timeline to make things difficult for Flash and Supergirl, while Reactron attacks Supergirl directly.
Chapter 912, "Identical Four Pillars of Destiny?!", is the clearest early answer because it turns Lin Manru's situation into a concrete plot event. A useful checkpoint is the way the scene starts with But the repeated blows made Wan Huixia's husband lose his confidence...
If you want the clearest chapter reference, go to Chapter 67. Early on, I'm pissed," Jiang Yan cursed again, "These people are too much, aren't...; later, the chapter leans on They expect us to fend for ourselves even to sleep and to eat—I mean, at....
A practical answer is Chapter 51, because it turns the idea into a concrete scene. The chapter opens with Oh, okay." After uttering two syllables indifferently, Jiang Li bent down..., adds pressure through With this in mind, she looked up and scrutinized the worried faces in..., and ends on If I.
A practical answer is Chapter 40, because it turns the idea into a concrete scene. The chapter opens with [Jiang Li claims she copied this herself?, adds pressure through Suddenly, someone typed in the live stream chat— "Oh my god, everyone,..., and ends on The handsome guys on this show are so.
Chapter 34 is the strongest chapter-level answer because it starts from Seeing that the public sentiment wasn't quite right, Su Yinwan felt... and follows through on Now that Lili is misunderstood, they start to kick us while we're down."....
A practical answer is Chapter 8, because it turns the idea into a concrete scene. The chapter opens with The resentment that had barely calmed among the crowd surged back two..., adds pressure through Why keep harping on the fact that he wasn't a decent man?, and ends on Other people with a.
Chapter 824, "Qixing Tower", 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 Just as he was feeling alarmed and drenched in sweat, Mr.
Look to Chapter 41 for the clearest answer. It begins with The live streaming room suddenly boiled over again., keeps building through [Did this matter really have such a big impact?, and lands on In contrast, Wen Jiaojiao didn't have such awareness..
A practical answer is Chapter 46, because it turns the idea into a concrete scene. The chapter opens with Upon hearing this, everyone but Jiang Li perked up with high alert., adds pressure through There must be some mistake with the crew's calculation, I demand a..., and ends on Did you calculate.
A practical answer is Chapter 36, because it turns the idea into a concrete scene. The chapter opens with But soon, people began to question the authenticity of Jiang Li's bare..., adds pressure through Qi Tianyu, catching the signal, instantly turned to the duo upon entering..., and ends on After.