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Underworld introduces an exciting new story campaign and a powerful new card set focused on turning your Archive (discard pile) into a potent resource.
From Agents and Support cards that gain strength the more you discard, to Events that let you bring cards from your Archive back into play, Underworld adds a range of exciting new options to deck building.
The Underworld set is powered by a unique risk-reward dynamic. Underworld cards can generate huge burst damage, but you'll need to burn your own deck to fuel your combos. Played well, you can sweep your opposition off the board. Played poorly, you burn down your own deck and leave yourself weakened and exposed.