After Being Reborn and Regaining Her Identity, the True Heiress Is Spoiled in the Seventies - Chapter 8: Do It Right, Leave No Chance.

Legend says, that there is a great demon, who is the human kind’s public enemy. He is the galaxy federations’ nightmare as he wanted to conquer the whole universe. On the first day, he completely took out the human fleet, plunging them into disorder. On the second day, he declared that he will wipe out the whole federation. On the third day, he declared——that the hero who shot him in their previous battle must marry him, or else, he will destroy everything.

The galaxy federation president and the council members had a long meeting after that. They decided to dispatch a soldier, Wu Xing Yun, and marries him off to the arrogant demon. Wu Xing Yun was once a hero who fought for the nebula, and henceforth, he was tasked—— for the sake human race and the universe’s peace, to eliminate mistresses, settle his matters with the mother-in-law, and fix the man’s crooked ways.

Wu Xing Yun was very perplexed when he asked his commanding officer: “Sir, why did it have to be this way?”

Commanding Officer: “Soldier, bear in mind, that this mission of yours, is for the sake of the universe and mankind’s happiness. You must hold on to your husband, and fight other mistresses! Do you have the confidence to accomplish this task?”

Wu Xing Yun, stood straight, saluted, and instinctively replied: “Sir, yes sir! I will accomplish this task!”

- Description from Novelupdates

Mysterious identity, three fathers to recognize, space in her left hand, a prince in her right.Building wealth, making big bucks, she never goes easy on the scum, and there's always someone to back her up in a fight.Xie Zhinuan thought, this life is just too sweet, it's not her fault she's so lucky.As for those losers, she really didn't want to fight them, but they asked for a beating by messing with her.All she wanted was to focus on her business, never thinking about marriage, especially not to someone so high-ranking and powerful... too scary, just too scary...Lately, what everyone was curious about was, “Did the Emperor succeed in his confession today?”

“Unlucky” would be the nice way to describe Lucas’ luck. He wasn’t just down bad. He was practically cursed.As someone who never asked to exist, he’s had to experience medical torture, imprisonment, and eventually death. And that was just his first life.Then, just as he thought of escaping his fate, he transmigrates into the body of the Empire’s most useless Flower Vase.Great, now he should have status, wealth, and beauty, right?Wrong.Because his new body, Young Lord Luca Kyros, was a vegetable. And what’s worse was that no one else seemed to know the truth. To everyone else, he was just your typical rebellious heir.He wouldn’t have minded that. He was used to being called a harlot or similar names for being a defective Guide. But the problem was he woke up right smack in the middle of the Royal Military Academy’s Assessment test.And his double body, the one who should be attending school, perished in an ambush.So now, he’s forced to resolve his existential crisis while attending a school he never even enrolled in.He’ll have to conquer his flimsy body, his brooding roommate, and his picky-eater “dungeon”—all that on top of surviving impending doom.Someone definitely needs a miracle.

I was reincarnated into another world, and I’ve brought the Horadric Cube from Diablo II with me.
Being a knight is cool and all, but being a wizard is pretty neat as well.
So, which one will it be?