The Invocation playmat whispers—or mutters, or howls—of the terrors that await you. Do you really want to enter that abandoned house? Do you really think your shotgun will protect you? Inspired by The Labyrinths of Lunacy, the Invocation playmat reminds you that the horrors of Arkham Horror: The Card Game can shatter your sanity just as easily as they can rend your flesh.