Supreme Electromagnetic Tyrant - Chapter 42 - 24 Star Gate

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.”

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

Hugo Fernandez, a short, skinny virgin with zero charm, was a young man with grand dreams. He had just started college and was brimming with hope for a bright future, but a rather unfortunate food poisoning ’incident’ soon turned his life from bad to worse. He experienced a social death! Out of the blue, a mysterious girl’s voice echoed in his head: [Ding! Fate has aligned, and your woeful destiny with women has reached the heavens! You have been granted the Ultimate Harem System!!!] Hugo’s listless eyes widened. Had he finally received his own cheat code? Was it time for him to ascend to the heavens in a single leap and start attracting women left and right? The mysterious voice spoke again: [Ding! Initialising Death mission... Seduce a 7+ woman within one month or die!] Hugo blinked, his jaw dropping. “Wait, what? Seduce a 7+ woman or die? What kind of medieval torture is this? I can’t even seduce my reflection!” After taking a minute to calm down, he realised it wasn’t as bad as he thought. “In the worst case, I can burrow some money and get a pro-” [No pay pigging] Hugo realised he was soon going to experience a real death! This system was out for his blood! [Tick tock, Romeo. Time’s wasting…] “I’m gonna die!” Join Hugo on a captivating, deadly journey filled with debauchery, womanising, and thrilling level-ups as he rises above all and becomes a Supreme Casanova! If he doesn’t die first, that is…

Jacob Steve, an Old Man, died at 116 after living a whole life.

But Jacob always had a dark side, which he always suppressed and hid from others.
However, in the later years of his life, when death was inevitable, he understood there wasn't any point in having wealth, knowledge, or desires if you couldn't have a life to enjoy them.

He became obsessed with fabled immortality and devoted his reaming life to extending his fleeting lifespan, but just like any other failed.

However, he mysteriously got another chance at life and found a way that led to fabled immortality.
But he was also forewarned that the way led to it was filled with blood and darkness!

In the end, Jacob chose it anyway with no way of going back, and it was also the start of his suffering and his icky, brutal journey toward the 'Immortality' he wanted so badly!