MTL - Survivorship Bias - Chapter 21 murder

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.

The servant looked at the grieving princess. “Your Highness, the Regent Prince sent your scholar fiancé to the Western Butcher’s daughter!” 

The princess gritted her teeth, speaking to her servant that it matters not as she has other suitors in line. Many days later, much to her dismay, the servant ran in a hurry. “Your Highness, the Regent Prince expressed his intention of becoming your suitor! All other men in line were sold to Gou Lan Red District!”

The princess was distressed. She said to her servant it matters not. She’ll soon be married to Prince Fuma. Then the uneventful came. The servant once more ran to her, almost tripping in the process. “Your Highness, Prince Fuma was imprisoned at home! Meanwhile, there’s a red sedan chair waiting at your residence for your marriage! It was led by the Regent Prince!

The princess was stunned. For a day such as this to come, it seemed impossible. This nothing but a sad story of a female boss crossing back in time to hold the thick thighs of the big boss. But while raising him, she was eaten in the process.

- Description from Novelupdates

Betrayed by the kingdom he bled for. Executed by the brother he once protected. Daemon died a war hero—branded a monster.But death isn’t the end. Not for him.Reborn on the day of his cursed birth, under the same blood-drenched eclipse, Daemon remembers everything: the lies, the poison, the crown soaked in his mother’s blood. This time, he won’t beg. He won’t protect.He’ll burn the empire from the inside out.His twin brother Gabriel—the golden child, the “righteous” king—stole everything. So Daemon will take it all back, piece by piece.The nobles who cheered at his execution? Dead.The soldiers who held him down? Ash.The kingdom that worshipped a fraud? Buried under screams.This isn’t about justice. This is about revenge, and Daemon’s not stopping until his brother’s skin hangs from the palace gates.The empire made a monster.Now it gets to meet him.

I became a heroine who dies during the protagonist’s awakening event.