One World Mega Evil Empire.

[Taqwus]

I believe MM mentioned that it did NOT decrease planet value, which should be useful in a finite-resources game.

If you can afford to carve out a large domain, and then play defensively (and expensively! 10k/10k/10k) for a long time while your opponents exhaust their resources, you'll be the only one left that can afford a fleet.

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-- The thing that goes bump in the night