Original sentence: The second expansion adds components for a sixth player, still more cards, and (limited) direct interaction between players (in the form of military conquest of certain worlds belonging to other players' civilizations; players who refrain from playing certain cards are immune to conquest)
Edited sentence: The second expansion adds components for a sixth player, still more cards, and (limited) direct interaction between players (in the form of military conquest of certain worlds belonging to other players' civilizations; players who refrain from playing certain cards are immune to conquest, as described in the Rebel vs Imperium designer preview