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

Micrometeoroid Storm

ACTION: Choose 1 system that contains another player's ships. Roll 1 die for each fighter in that system. For each result of 6 or greater, destroy 1 of those units.
Action card

ACTION:

Choose 1 system that contains another player's ships. Roll 1 die for each fighter in that system. For each result of 6 or greater, destroy 1 of those units.

1in the deck
–chance to draw
Yescomponent action

Source: Uncharted Space