As this novel will be very grand as it encompass 4 realm with 3 times ascension. The cultivation stage on this novel also much complete than the other novel. Even if I also put more of cultivation stage with its explanation on my G-drive, and if I remember correctly some of them come from different novels.
Maybe I will also listing her expertise? and any other thing that I think it will be important or meaningful in this novel.
Anyway if you come here from "I Became a Fairy And Lived Forever In The Fairy World" (other novel that I also upload here), our current MC- Jiang Dan is basically level up version of Su Min's. As in that story it was just her journey as in the beginning of her cultivation and she was 'alone' without sect (she build her own sect from scratch).
Jiang Dan in other hand, she will join the sect and organization both of the Dao and Demon side (noted that she is also possess "Chaos"). This also her second life, different with Su Min that she just a fresh-graduate with computer programming job before she transmigrated. Meaning that Jiang Dan exposure to other craft and technique (such as music, alchemy, refining, talisman, array, etc) is way better than Su Min's, also if you forget in that continent because "Heavenly Decay Curse" many cultivators sealing themself and many sect is destroyed because of that, making it harder for her to learn anything else beside alchemy and refining as it was granted by her Devine Divine Ability: Heavenly Dao Insight. That's why she also envious with Xie Yingying's legacy.
I forgot to mention one thing, as far as I remember this novel is [NoCP]- No Couple Pairing.
For the choice of novel's title, Jian Dan in the original fate is not 'Villainess' but Supporting Role, more precisely the Treasure boy. She provides magic weapons, opportunities, and clears obstacles for the heroine Du Yanran to help her achieve immortality. Du Yanran always got the benefits and she was always the one who got hurt.
Now in this second life, she was bound to get revenge to everyone that wronged her in the past, meaning she also will eventually deal with Du Yanran. This will make Jian Dan likely become 'Villainess' in her story. Slight spoiler, both of their fate still entangled even when Jian Dan already ascend on the Immortal Realm, and Du Yanran had died in Cultivation Realm.