I have a question about Swamp Thing. It says it's worth 5 power "If you control a Location." Let's say that I just bought a Location, so it's in my discard pile and not yet in play. Does the effect of the Swamp Thing card get triggered? In other words, does owning the Location mean you control it, or do you only control it once it's been played (and therefore sitting out for the duration of the game)?