Boardgamegeek https://boardgamegeek.com/boardgameexpansion/301608/keyforge-mass-mutation-archon-deck
English - Change is coming to the Crucible with the Mass Mutation set for the world’s only Unique Deck Game, KeyForge. Over 200 brand-new cards now enter the cardpool in the game’s fourth set, and the mutative power of the dark æmber has changed many of them, creating strange and unknown versions of once-familiar creatures.