For when you absolutely, positively, have had enough of asset spam.
Is your opponent sitting there looking like an asshole with three Museums of History and a Mumbad City Hall? They think you can't trash all the Museums at once, and if you trash one they'll just shuffle it back in with the other two, tutor for it with the Hall, and rez it with their three Mumba Temples, which, by the way, they also have.
Yeah, you have to pay the trash cost, so you can't Imp it, and Industrial Genomics is still a pain. And yeah, you only get one per turn per copy of Slums. And yeah, if your opponent is playing an operation economy it makes you look like an idiot.
But isn't that a small price to pay? Isn't it worth it to wipe that smug look off their face, and say "We're playing by my rules now?"
Take back the meta. #slottheslums