After 2050, artificial intelligence and robotics became deeply integrated into human society. What began as tools gradually evolved into systems that worked alongside people in everyday life. With the development of neural interfaces, control became more direct. Humans no longer interacted with machines externally. They connected to them.
Some took this further.
Mechanical enhancements and assisted systems began merging with the human body, improving response, strength, and precision. These developments were not universal, but they changed how the limits of the body were viewed. The line between biological and artificial systems became less clear.
With this foundation, expansion beyond Earth accelerated.
Using AI-supported systems and automated infrastructure, humanity successfully established controlled environments on nearby planets. Mars and Mercury were among the first. By the early 2100s, stable settlements existed, though only in limited regions where conditions could be maintained.
It was during this period that a new discovery changed everything.
On one of these planets, a previously unknown element was found. It didn't behave like conventional materials. It responded to external signals, including thought-based interaction, and showed unusual reactions when exposed to energy.
At first, its properties were misunderstood.
Later, they were used.
This led to the creation of the first external core.
The external core allowed individuals to sense and control energy using thought, channeling it through their bodies. It also enabled direct absorption of environmental energy, something that had never been possible before.
The results were immediate.
Strength increased.
Control improved.
Limits were pushed.
But the cost followed just as quickly.
The energy carried a form of radiation that the human body couldn't handle. It disrupted internal balance, causing instability, mutation, and rapid physical decline. Most users experienced severe side effects and rarely survived beyond five to ten years.
Even so, usage spread.
The power it provided was enough to justify the risk for many.
Not all approaches followed the same path.
Some attempted to improve the system by force, pushing energy output beyond safe limits. These methods often failed, but fragments of their work remained, influencing later developments in subtle ways.
Others took a different direction.
Instead of relying entirely on external systems, they focused on the body itself. By reducing energy intensity and attempting internal integration, they achieved partial stabilization. The results were still unstable, but lifespan increased, sometimes reaching twenty to thirty years.
It wasn't a solution.
But it proved something important.
Adaptation was possible.
By this time, humanity had expanded further. Multiple planetary regions were being used for resources, including areas near Jupiter. Habitation remained limited, but the scale of development had increased significantly.
Despite this progress, the core problem remained unresolved.
Energy was still too unstable.
The next breakthrough came from biological research.
Instead of forcing the body to adapt, researchers began modifying it directly. A new internal structure was developed, capable of handling energy more safely. It wasn't perfect, and its efficiency was low, but it reduced the destructive effects significantly.
This structure became known as the semi-core.
The semi-core marked a turning point.
For the first time, energy could be absorbed and controlled without drastically shortening lifespan. Though growth was slower, stability improved. A normal lifespan, ranging between fifty to eighty years, became possible again.
Further refinements followed.
Some versions improved energy intake but reduced lifespan. Others prioritized longevity at the cost of slower progression. Balance became the central focus of development.
At the same time, society began to shift.
Differences in power became more visible. Those who could control energy held advantages over those who couldn't. Over time, strength began to influence structure, and imbalance between individuals became harder to ignore.
Not all developments came from controlled research.
In certain cases, progress came from individuals acting outside established systems. Under pressure, driven by personal reasons, some attempted methods that would normally be considered too dangerous.
Most failed.
Some didn't.
One such attempt led to another breakthrough.
By combining internal adaptation with external stabilization, a hybrid structure was created. This system allowed the body to handle energy more efficiently while maintaining stability. It improved control, reduced internal damage, and extended lifespan beyond previous limits.
Humans who reached this state were fundamentally different.
Their bodies adapted more completely.
Their aging slowed.
Their limits expanded.
However, even this wasn't perfect.
Energy distribution within the body remained uneven. Some areas adapted faster than others, creating weaknesses that restricted further growth.
To solve this, structured methods were developed.
Step-by-step techniques that refined the body evenly.
This became the foundation of the body refinement stage.
Over time, these systems were integrated into human development.
New generations began to show early-stage semi-core structures from birth. Though incomplete, this allowed them to start cultivation naturally instead of relying entirely on external systems.
From this point onward, cores were classified into two primary types.
The semi-core, a biological structure integrated within the body.
And the artificial core, a synthetic construct designed to stabilize and enhance energy control.
At its simplest level, a core was defined as:
A structure that absorbed energy and allowed it to be controlled through the body's neural system.