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

Exodus Engineering

You can produce ships in systems that contain both your ships and another player's ships. After 1 of your opponent's non-fighter ships is destroyed, if this card has not yet been flipped during this combat, you may flip this card to place 1 frontier token in the active system. Exodus Engineering: You can produce ships in systems that contain both your ships and another player's ships. After 1 of your opponent's non-fighter ships is destroyed, if this card has not yet been flipped during this combat, you may produce 1 or 2 non-fighter ships in the active system to flip this card.
Dih-Mohn FlotillaBreakthrough

You can produce ships in systems that contain both your ships and another player's ships.

After 1 of your opponent's non-fighter ships is destroyed, if this card has not yet been flipped during this combat, you may flip this card to place 1 frontier token in the active system.

Flipped sideExodus Engineering

You can produce ships in systems that contain both your ships and another player's ships.

After 1 of your opponent's non-fighter ships is destroyed, if this card has not yet been flipped during this combat, you may produce 1 or 2 non-fighter ships in the active system to flip this card.

SynergyCyberneticPropulsion

Source: Discordant Stars