Perpetual Motion Machine

Energy and matter.

Although both of them existed everywhere in the world.

Finding them was countless times easier than failing to find them.

But even so.

These two would still become the main factors deeply troubling countless lower lifeforms, as well as one of the primary shackles severely limiting the continued advancement of countless lifeforms.

Like an unscalable natural chasm, they forcefully blocked an unknown number of lifeforms.

There was plenty, but not enough.

It existed, but could not be used.

That was the truest depiction of energy and matter.

For those who wanted to advance.

All kinds of difficulties related to energy and matter were often placed before them like an insurmountable chasm.

Not to mention mere surface civilizations.

Even Interstellar Civilizations capable of easily achieving Superluminal Speed travel across the vast starry sky, igniting stars as casually as lighting matches and burning galaxies as simply as children playing, could often only silently scratch their heads when facing these problems.

After all.

Even Interstellar Civilizations that traversed the galaxies faced resource shortages and energy shortages.

Even civilizations capable of creating universes and reshaping spacetime were no exception.

If that were not the case.

They would have had no need to create universes to serve as factories for their own raw materials.

The so-called "enough" only meant that their needs were not great.

It absolutely did not mean their resources and energy were truly so abundant that they had nowhere to use them.

Energy and matter.

For a civilization, they were actually like food.

Moreover, they were the most essential and primary food.

Without them, a civilization's destruction would be a matter of days.

Within minutes, it could begin its complete decline and vanish into the river of history.

Furthermore.

All kinds of turmoil and wars in the world...