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

Quantumcore

During the movement step of your tactical actions, you may move 1 of your structures from a system that does not contain 1 of your command tokens to a planet you control in the active system. When an opponent commits ground forces to a planet that contains 1 or more of your structures, you may destroy 1 structure on that planet to return the committed units to the space area. If you do, purge this card
Technology – Cybernetic + Warfare

Cybernetic + Warfare

During the movement step of your tactical actions, you may move 1 of your structures from a system that does not contain 1 of your command tokens to a planet you control in the active system.

When an opponent commits ground forces to a planet that contains 1 or more of your structures, you may destroy 1 structure on that planet to return the committed units to the space area. If you do, purge this card

Source: Absol