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

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Starfall Gunnery

During Movement, while you are not the active player, you may only use 1 of your unit's SPACE CANNON. During each of your actions, up to 3 of your non-fighter ships gain SPACE CANNON 8.
Monks of KolumeFaction ability

During Movement, while you are not the active player, you may only use 1 of your unit's SPACE CANNON. During each of your actions, up to 3 of your non-fighter ships gain SPACE CANNON 8.

Source: Discordant Stars