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

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Tempest Drive

After you win a combat in a system, you may exhaust this card to remove 1 command token from that system.
Kortali TribunalTechnology – Biotic

Biotic

After you win a combat in a system, you may exhaust this card to remove 1 command token from that system.

Prerequisites: BioticBiotic

Source: Discordant Stars