Hot Box Expansion for Cards Against Humanity. As the dawn breaks on a new era of Cards Against Humanity, an enormous new expansion emerges on the horizon. Bathing the world in its glorious light is the all-new Hot Box, featuring 300 scorching cards to set your deck of Cards Against Humanity ON FIRE 300 fresh cards to spice up your deck of Cards Against Humanity. Features a massive image of the sun. This is an expansion and requires the Main Game.