The strategic goal of the Z plan isn't to go down together, but to temporarily abandon the Emerald Star.
The emphasis is on the word "temporary," as the aggressive Blue Star civilization would rather give up their immediate interests to completely destroy the entire ecological environment of the Emerald Star.
The alien race "Sagali" has not only thoroughly developed the Emerald Star, but also comprehensively. Otherwise, there wouldn't be more than a hundred million "Seed Nests" everywhere. Both the land and waters are fully utilized.
Therefore, the simple and brutal destruction of the natural ecological environment is beneficial in striking a blow to the war efforts of the other side, which are based on biological technology.
Besides the world-destroying power of the Tsar Plus, the Blue Star civilization also prepared a large batch of specially bred mutant hatchlings.
