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

Policy - The Environment: Preserve +

Once per action, after you exhaust a hazardous or legendary planet you control, you may reveal the top card of the exploration deck that matches 1 of those planets; if it is a relic fragment, gain it, otherwise discard that card. Plunder −: When 1 or more of your units use PRODUCTION, reduce the PRODUCTION value of 1 of those units by 2. Once per action, after you explore a hazardous planet, you may remove 1 unit from that planet to explore that planet.
Olradin LeaguePolicy card

Once per action, after you exhaust a hazardous or legendary planet you control, you may reveal the top card of the exploration deck that matches 1 of those planets; if it is a relic fragment, gain it, otherwise discard that card.

Flipped sidePlunder −

When 1 or more of your units use PRODUCTION, reduce the PRODUCTION value of 1 of those units by 2.

Once per action, after you explore a hazardous planet, you may remove 1 unit from that planet to explore that planet.

Source: Discordant Stars