What is the most expensive in the era of interstellar warfare?

Talent.

Military talents are talents, political talents are talents, diplomatic talents are talents, and production talents are also talents.

Even on a small planet, talent is scarce, and trying to govern a planet well is enough for a civilization to spend thousands of years with all its might.

What's more, when I went to space, I walked out of the category of galaxies, and walked over one star region after another, spanning time and crossing

Chapter 55 of the Interstellar Overlord Cultivation Guide. Starship Design is in the middle of the hand, please wait a moment,

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