Twilight's Fall – a separate game. Twilight Imperium's expansions, mods and rules topics are not part of it.

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Nightfall Fortress

When a player activates this system, remove a different player's command token from this system, or gain 1 command token.
Li-Zho DynastyUnit – Structure – Monument

Monument

When a player activates this system, remove a different player's command token from this system, or gain 1 command token.

Placement
HazardousIndustrial

Source: Monuments