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

Arbitrage

When you pass: Gain 4 commodities; for each commodity you would gain in excess of your commodity value, gain 1 trade good instead.
Action card

When you pass:

Gain 4 commodities; for each commodity you would gain in excess of your commodity value, gain 1 trade good instead.

1in the deck
–chance to draw
Nocomponent action

Source: Uncharted Space