For a whole day, Shen Cong tested the metamorphosis the new grade had brought.

The interior view.

Beyond-visual-range.

Insight into the Activity waves.

His body starting to swell under the strain.

Of these, the insight into the Activity waves was a boundless delight—where his old understanding had stopped at fluctuation frequency, waveform structure, and combination method, he now grasped their basic makeup.

Light has wave-particle duality: it is both particle and wave.

Activity waves, as it turned out, have wave-particle duality too—both wave and particle. The coherent vibration of particles composes every form the Activity waves take. Once he perceived this layer, his willpower could govern the fine distribution and vibration of the particles, and so reshape any fluctuation at all.

If yesterday Shen Cong's grasp of the Activity waves had been the surface.

Then today's was what lay beneath.

This was a wholly new way of understanding, enough to overturn most of what he'd known before.

For an ordinary evolved person, this would be near impossible to grasp, and harder still to master even once grasped. But for Shen Cong, now past nuclear-grade—having seen through the secret of the Activity waves' wave-particle duality—commanding them came as easily as eating and drinking.

Short of this realm, there was no understanding it.

A realization of mystery upon mystery.

"The Activity light-wave is no longer a secret. I can deploy it directly, without any equipment—which means the Vajra Fortress can throw out an Activity light-wave at will too. Its whole body is a weapon! And the power of the Activity light-wave can be optimized, refined, raised a great deal. Keep refining it, and not even a nuclear-grade evolved individual could hold it off!"

When he'd known only the "surface" of the Activity waves, the corrosiveness of the Activity light-wave could badly wound a super-grade at most, and it struggled to badly wound an ultimate-grade in an instant.

Now that he knew the "interior," the Activity light-wave could reshape its structure to aim its corrosion where he wanted. Short of Shen Cong's grade and a deep grasp of the Activity water-wave, there was…