Each card separately determines where it creates Invader Actions. If a land matches multiple cards, it can thus get an Invader Action from each one! Clarifications for specific actions:
Anything effect that checks which lands match the Invader Cards in a particular space (e.g., the
Hard-Working Settlers Event) or the terrains showing on those cards (e.g., the
Fortification Event), checks
all of those cards. (It generally won't matter how many times those lands match or those terrains appear, just
if they do.)
Tags: Invader deck, Matches, Tsardom of Russia, Surges of Colonization, 6 more...