Twilight Imperium: Fourth Edition – Twilight Codex Volume I: Ordinian

It replaces the preexisting component with the same name and type; use one version, not both (p. 8).

No. The primary ability lets you refresh any two of your planets, not every planet in a chosen system (p. 14).

Units roll as they pass through the rift. Units that fail are returned to their owners’ reinforcements, not destroyed, so destruction-triggered abilities do not resolve (p. 14).

No. When a ship moves as part of a retreat, it can transport ground forces from planets in its system as normal (p. 14).

No. Roll dice for all your units in the combat first, then decide which, if any, to reroll (p. 14).

You control it while you are the only player with ships in its system, and lose control if you no longer have ships there. At the start of your turn, if you control it, you may spend 6 resources to repair it; it then awards its controller 1 victory point and adds the agenda phase to the game (p. 12).