Interstellar Zerg

Interstellar + Technology + Machinery + Interstellar Battleship

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Hard Science Fiction! Hard Science Fiction! I Want Hard Science Fiction! ! !

Interstellar, Empire, Starship Battle (No Fantasy)

I want to read a book similar to "Is it reasonable for a second-level civilization to have two-way foil (Deep Space Catastrophe)".

Zerg Natural Disaster, Undead Natural Disaster, Mechanical Natural Disaster, and Fourth Natural Disaster.

Zerg natural disaster, undead natural disaster, mechanical natural disaster, and the fourth natural disaster, which one is the most powerful?