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

Shard of the Throne

When you gain this card, gain 1 victory point; when you lose this card, lose 1 victory point. When a player gains control of a legendary planet you control or a planet you control in your home system, that player gains this card.
Relic

When you gain this card, gain 1 victory point; when you lose this card, lose 1 victory point. When a player gains control of a legendary planet you control or a planet you control in your home system, that player gains this card.

1in the deck
–chance to draw

Source: Prophecy of Kings

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tirules.com
  • When the player that owns the Shard of the Throne loses control of a legendary planet or a planet in their home system, they immediately give it to the player who gained control of that planet. No abilities may be resolved before this.
  • If the player that gains Shard of the Throne controls no legendary planets or planets in their home system, they cannot lose it.