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

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Geosympathic Impeller

After you activate a system, you may exhaust a planet you control of the same type as a planet in that system to apply +1 to the move value of each of your ships during this tactical action.
Olradin LeagueTechnology – Propulsion

Propulsion

After you activate a system, you may exhaust a planet you control of the same type as a planet in that system to apply +1 to the move value of each of your ships during this tactical action.

Prerequisites: Propulsion

Source: Discordant Stars