Castle of Black Iron - Chapter 8: Mental Arithmetic by Abacus

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

Cheng Feng, an ordinary young man. He isn’t genius, however, his elder sister has a unique body, Nine Linglong Body.

One day, his brother in law awakes an eight order martial spirit and become a peerless genius in Hidden Dragon Academy. In another side, he can reach that step because of receiving the help of Cheng Feng’s elder sister.

When Cheng Clan’s people think that their clan will rise and advance to a higher status, but this is the beginning calamity of Cheng Clan. Their talented son in law writes off the marriage,

Cheng Clan Patriarch dies…

….

His elder sister commits suicide…

After Cheng Feng sees the calamity of Cheng Clan, his heart is wrath, he only wants to revenge to the people who cause his clan fall to this step.

” I will take revenge to the people who make…”

But he doesn’t have the strength to do it until he hears a mysterious voice…

- Description from Novelupdates

MC (female protagonist) dies in a plane crash and wakes up in the body of a beautiful but corrupt and lascivious prime minister in ancient times, Zhang Qinglian. As circumstances decree, he (she) cannot reveal that the original owner’s soul is gone else calamity might occur. So he (she) decides to walk a righteous path, determined to help the lovely but simple little emperor rule the country. Not backing down after facing torture, not losing courage, destroying rebellions and facing off with scheming princes.

- Description from Novelupdates

Zhang Beixuan, who transmigrated into a parallel world, became a Daoist Purple Robed Celestial Master.Before the old Celestial Master passed away, he arranged a marriage for him, instructing him to share his bridal chamber with a thousand-year-old fox spirit.As Zhang Beixuan was utterly confused about the meaning of this, the next day, he received the fox spirit’s dowry and marriage contract.Ding! The Daoist Prosperity System has been activated. Since the host has bound to it for the first time, it offers a divine-level choice once!Option One: Refuse the thousand-year fox spirit face-to-face and self-castrate, making it clear that he will never agree to the bridal chamber. Reward: [Fiercest Celestial Master Plaque] [Thousand-Year Fox Spirit Essence]Option Two: Escape now, never to return to the mountains, with the reward of [Top-Quality Youthful Essence, Maintaining Vitality and Power, Cultivation Speed of a Thousand Miles in a Day] .Option Three: Who cares about fox spirits, snake spirits, or female ghosts? If I don’t enter hell, who will? Reward: [Savior of All Beings Title] [Hundred-Year Cultivation] [Golden Light Spell Max Level] [Celestial Master Daoist Robe]Zhang Beixuan looked at the options and silently picked up the dowry on the ground.“Let it be a fox spirit, at least she’s a female.”