GRE3D

[You have died]
[Initiating System Activation...]
Those were the words that rang in my ears the moment my vision had turned black. But unlike others who were thrown into the same situation as me, I didn’t die.

[Immortality System has been activated]

I was thrown 300 million years back in time to an era where the weak were preyed on, and the strong ruled with iron fists. An era of magical creatures beyond human understanding. An era of intelligent creatures that could rule over humanity with the power of their stare alone, and ones who could dissipate a hurricane with the snap of their fingers.

An era with magic and evolution that would allow me to climb to the top…

Thrown into the wild with no one to rely on, I was forced to turn towards the only semblance of hope in this cruel and uncaring world. The only thing that could help me survive this madness.

The light at the end of the tunnel for the last human who persisted until the end.

The only system worthy for the last survivor, and humanity's final anchor. 

[Welcome to the Immortality System. A system that makes sure you never die as long as you work for it!]
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To interact with the author, report mistakes, and see what the characters look like, join the discord Server: https://discord.gg/PtzXQBvAj5
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Author's Note:
The story will have elements of psychology and will explore the main character's mental health. It might also sometimes have information dumps but I'll try to keep it to a minimum. 

This is not a novel with an overpowered MC. The mc, while being immortal to an extent, starts off very weak and slowly gains strength.

WARNING: For the first 30 or so chapters, the mc is barely survives by the skin of his teeth. Give the novel a chance because the mc does become much stronger from chapter 40 and onwards.

NO HAREM!
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--------------------Rewards--------------------
Golden Tickets (Per month):
-100 GT = 1 Extra Chapter
-300 GT = 5 Extra Chapters
-500 GT = 10 Extra Chapters
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Gifts:
-Castle = 5 Extra Chapter
-Spacecraft = 10 Extra Chapters
-Golden Gachapon = 15 Extra Chapters
{Do take note that if you do give me a spacecraft or a golden gachapon, I might not be capable of giving you the chapters on the same day. However, a castle should be doable}
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Immortality System: The Last Human's Transmigration

"Sure. What do you have in mind?" I asked while trying to hold back the smirk that was threatening to creep up the corners of my lips.

The snake on the other hand made sure to keep its head at the same level as my body, probably done to not anger or disrespect me.

My eyes did not leave their own, making it finally open its mouth and speak.

"I would like to propose that the two of us make a soul contract so neither side can break their end of the contract. On your side, I simply want to learn and study you. My ambition in life is to learn as much as I can from all the creatures in the world. I was to talk and learn from them, and in return I would give them a fraction of my knowledge too to pay them back for what they had told me." The snake explained.

The desire to smile immediately dissipated while a confused expression replaced the one I had worn before.

Soul Contract