Blackstone Code - Chapter 177:

While on a plane ride, Shuuta Fenton and his classmates are whisked away to a fantasy world by Holy Lord Meruria. She reveals to them that they are to be her Soul Warriors. Most of the students display extraordinary skills after opening their Soul Crystal, but Shuuta is the only one to not have any potential, being cursed with a 0-Star Soul.After a sham trial to decide whether or not he can be useful to her, in which his own sister argues for his sacrifice, Holy Lord Meruria banishes him to the void, an inescapable realm of unending torment, to recoup the Holy Mana she spent on summoning him.While his body was destroyed, Shuuta's desire for revenge keeps his soul intact long enough to gain the attention of an unknown entity. It alters his essence and turns him into a chimera, something viewed as a blasphemous abomination that grows stronger by consuming others.After his soul is summoned again, and this time by the imprisoned Dark Lord of Tyranny, Shuuta frees her and throws away his former identity to become Lyudmila Springfield, the future Transcendent Dark Lord that will spill the blood of her enemies.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

The Story of One Continent ~Allison and Wil and Lillia and Treize and Meg and Seron and Everyone Else~ is one final send-off for the long-running series of novels by Keiichi Sigsawa that includes Allison, Lillia and Treize, and Meg and Seron.

As this is a sequel that involves characters from all three series, you are advised to read all of Allison, Lillia and Treize, and Meg and Seron before diving in.

[Main Plot Completed]A love doomed from the start, a lost cause, a losing battle—and yet, neither hearts are willing to let go until the very end.-----Arlan Cromwell, the epitome of the perfect Crown Prince. All he wants is to live a normal life of a human but the life of a dragon is anything but normal. He has but one goal—to find his runaway betrothed and behead her. What happens when he discovers that the woman who has snagged his heart is the one he vowed to kill?Oriana, a Black Witch, disguising herself as a man, has spent her entire life on the run without knowing what she is running away from. When the mysteries of her past slowly catch up to her, she has no one to turn to…except Arlan. But when she learns that the man she has given her heart to is the same man who wants to kill her, how can she accept the cruel card life dealt her?Two people with secrets to keep, identities to hide, and answers to find. When the certain darkness threatens to take Oriana away, will the Dragon be able to protect his mate?-----Excerpt-“If I knew you were my betrothed, I would have killed you the very first moment we met.” Arlan's gaze darkened with hatred.“If I knew I was betrothed to you, I would have killed myself before you even killed me!” Oriana mirrored the same emotions as him.He pulled out a dagger and offered it to her. “It’s not too late. Just slit your throat with this and you'll bleed out painlessly.”She accepted the knife, her fingers clutching its handle tightly. The next moment, he was pressed against the wall and the knife was on the right side of his neck. “How about I try it on you first, my betrothed?”“Feel free to try. But when you fail, this knife will first taste your grandpa's blood, then yours.”Anger rose in her eyes, and the next moment, blood was flowing through the right side of his neck. She cut deep enough to severe an important blood vessel.“You should not have challenged me,” she sneered and stepped back, waiting for him to collapse.He simply smirked and brushed his finger along the deep wound on his neck. “Seems like you failed.”She watched the wound on his neck heal on its own and felt shocked to her bones. “You.. what are you?”“Guess?”