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

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Deep Mining

When you would explore a planet that contains 1 of your mechs or structures, you may instead gain 1 trade good.
Gledge UnionFaction ability

When you would explore a planet that contains 1 of your mechs or structures, you may instead gain 1 trade good.

Source: Discordant Stars