The Regressor and the Blind Saint - Chapter 17

Leon, an ordinary man, meets his untimely death only to be reincarnated in a mysterious realm where colossal towers reach beyond the sky. In this world, individuals climb these towers to gain power, wealth, and ultimately, godhood upon reaching the highest level. Each floor is a trial of increasing danger, filled with magical beasts, traps, and rivals. However, Leon is granted a special cheat ability: the Super Charity System.The Super Charity System allows Leon to receive incredible rewards for any charitable act he performs. Whether it's offering aid to struggling climbers, donating resources, or saving someone’s life, the system exponentially multiplies his gains in return, bestowing him with rare artifacts, strength, abilities, and many more.As Leon progresses through the tower, his rapid growth and benevolent acts draw attention. Some revere him as a hero, while others plot to use his generosity for their own gain. But as he ascends, Leon faces a profound question: in a world where power is everything, will he stay true to his charitable heart, or be tempted to exploit the system for himself?****It will be R-18, you all have been warned and invited *cough*I meant warned.

A ritual gone wrong gave him the world's deadliest Class—now all he wants is blood.Zeth stole the most powerful ritual magic in the world from a mad cultist. A Class that's fueled by the blood of his enemies and human sacrifice. One that's illegal to use, punishable by gruesome death. And now that he has it, he's faced with a choice: hide away for the rest of his life from those who would hunt him down, or embrace the power, becoming the hunter to get revenge on the murderer that stole his friends' lives.For Zeth, that's no choice at all.His enemies have to die. And he plans to use every drop of blood, eldritch ritual, and demonic summoning he can to kill them.

Some say reincarnation is a blessing, but for me, it's a dreadful curse. Cursed with endless reincarnation, I've been reborn as a villain 137 times. And all 137 times, I've been toyed with and killed by heroes who are far more cruel than the said villains... If I can't win no matter what I do, then I'll crush those so-called heroes at their very roots. - Quality Fan Translations, Made by Fans for the Fans - Villain Takes Over The Academy

A boy from 21st century Earth, met an accident and later was reborn in Naruto’s Ninja World.
He is born in Uchiha Family and becomes the useless brother of Itachi Uchiha and Sasuke Uchiha…. Let’s see how he changed the Naruto world.

- Description from Novelupdates