Darkness is coming to Ravnica. A conflict that could tear apart the world itself looms large, and the fragile peace between the guilds is strained to its breaking point. Now, with everything on the line, it's time to step up, prove your loyalty, and fight for your guild. Get the cards you want for the deck you want! Each card in a Ravnica Allegiance Theme Booster fits in a deck of that guild's specific colors, so you can power up your favorite deck on demand.