Legendary Skill Part 2

In real-time, the system began to re-engineer his entire railgun right before his eyes.

His arms trembled slightly, releasing sand-like black material that swirled around him, gathering to form the weapon.

As he watched, intricate designs materialized before his eyes, as if they were being 3D printed. 

Each component appeared with astounding precision, made possible after he had evolved into a Demon King and got a new type of body. 

If before, his bones were like jelly that could be reshaped, now they resembled individual grains of sand, granting him the ability to create things with more details. 

However, this type of change required immense mental power—so much that even a genius like him couldn't pull it off . 

The level of intricacy involved in manipulating this many individual particles was beyond what any individual mind could handle.