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

Reclamation

After you resolve a tactical action during which you gained control of Mecatol Rex, you may place 1 PDS and 1 space dock from your reinforcements on Mecatol Rex.
The WinnuFaction ability

After you resolve a tactical action during which you gained control of Mecatol Rex, you may place 1 PDS and 1 space dock from your reinforcements on Mecatol Rex.

Source: Base game

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tirules.com
  • Placing the structure will occur after the Production step. If the Winnu player places a space dock, they cannot produce out of it during the same action.
  • If the Winnu player has no PDS or space docks left in their reinforcements, they may remove a unit from any system that does not contain one of their command tokens and place that unit on Mecatol Rex when resolving RECLAMATION.