Le_Merwen

We were a peaceful people living in harmony with nature in the vast lands of Lyréanor, but this peace was short-lived when our people were defeated by the dark elves, an ancient people even older than this world. It is said that they arrived in Lyréanor by boat and since their arrival, chaos has been unleashed. Proud of their obscure power, derived from dark rituals, they have raised gigantic armies of monsters whose name is synonymous with terror: ‘Obscurus’. 
They went on the rampage, and everywhere they went the grass didn't grow back, life died and disintegrated. Seven, there were seven. The seven dark elves known as the Lords of the Apocalypse. A single gesture from them was enough to strike us all down, a single gesture from one of them was enough to decimate us in blood and terror.
And as I, Foster, contemplate the macabre scene before me, the bloodied and deformed bodies of my fellow elfes beings, and as death grips my soul, a strange sign appeared before me.
[Ding... Activation of the world tree system]

If you'd like to discuss the book, I've set up a Discord server: https://discord.gg/sc4nWZwec2

Hello everyone! I'm the author of this little book, and I'm sorry to take your attention, but I've got a few things to say to you! I'm in the process of creating a new book that's totally different but stays within the theme, so I'll give you the title and synopsis! If you like the story, could you support it?

Sincerely yours, your favourite author!

Title: Starting out as a slave to dragons.

Synopsis: When Isaac opens his eyes, it's not death that awaits him, but a new life... in a world identical to his own, with one exception: portals leading to monster-infested dungeons are appearing across the globe. If their boss isn't defeated in three days, the creatures escape and wreak havoc.
In this world, awakened hunters are the only line of defence against these horrors. Graded from F to SS according to their magical power, they rule in a society dominated by force. Isaac wakes up in the body of a young boy of rank F, an orphan with no future.
But his destiny changes when he discovers a unique gift: every night, his mind is projected into another world, a nightmare where dragons have enslaved humanity. In this hell, he is just another slave... but he soon realises that this cursed world holds the answers to the future of his own.
To survive and prevent history repeating itself, Isaac must move forward. His only hope? A mysterious system that allows him to absorb the strength of monsters. Armed with a katana, he embarks on a race against time to unlock the secrets of these two worlds and prevent the inevitable.

Link : https://www.webnovel.com/book/31979275600112705

My world-tree system

The flight continued over the ancestral forest, but this time the excitement of discovery was replaced by calm concentration. Foster, perched on the back of his dragon - now an imposing, majestic, almost unreal creature - observed the landscape below with a watchful eye.

- Can you smell them?" he murmured, his fingers brushing against his companion's warm green scales.

Foster nodded. He'd expected that. Mana fruits emitted very little magical aura. They had evolved this way to escape magical predators, including the Obscurus. Their energy remained deeply buried, as if asleep, until a particular force awakened them.

- Then we'll have to do it another way.

He closed his eyes, searching his memories of his past life.

"Fruit feeds on memory. Where magic has bled, they can be reborn."

Chapter 84: Fruit