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

Metali Void Shielding

Each time hits are produced against 1 or more of your non-fighter ships, 1 of those ships may use SUSTAIN DAMAGE as if it had that ability.
Relic

Each time hits are produced against 1 or more of your non-fighter ships, 1 of those ships may use SUSTAIN DAMAGE as if it had that ability.

1in the deck
–chance to draw

Source: Twilight's Fall