Fairy Tail: Collapsing Stars - Chapter 757: Lin Jing and Su Wan

This is a ‘rebirth’ story where Chen Rong, the heroine, finds her second chance at life after burning herself to death. Set in the Eastern Jin era when bureaucrats and their lofty yet equally hypocritical and oppressive ideas once ruled the empire, Chen Rong is made to use her past life’s experience to survive and hopefully find happiness this time around.

- Description from Novelupdates

Lin Qian and Zheng PingQing, two people who have wanted to kill each other for many years, fell in love. After a lot of ups and downs, they finally married.

Cultivation destroyed, eyes poisoned blind and robbed of her status in the household?Luo Qingtong narrows her eyes and sneers, “Bring it on! Let me teach you a lesson!”A 24th Century Supreme Vision Master transmigrates to become the incapacitated genius daughter of the Marquis Household in a lower-class country.With a pair of powerful blood-red eyes armed with the ability to appraise treasures, see through things, heal, poison and break through defenses... She is invincible!A spirit and martial arts cultivator, an expert in weapons and medicine, a master in controlling beasts and deploying formations...She is the embodiment of the ultimate supremacy and unrivaled arrogance!Never does she expect to get involved with a person who is even more wicked than her. From then on, it becomes a game of I-run-you-catch. When you kill someone, I’ll hand you the knife.Together, let’s wreak havoc in the world!

When a person dies, they either die light as a feather (aka unimportant) or heavy as Mt. Tai (aka very important).