Keyforge Mass Mutation Starter Set

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SKU: 12205
UPC: 841333110475
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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.

As gigantic creatures stretching across two cards lumber their way into battle, and House Sanctum makes its triumphant return, there has never been a more impactful time to leap into the fast-paced duels of KeyForge.

Here in the world’s first Unique Deck Game, two players become Archons racing to forge keys that unlock the hidden vaults of the Crucible, an artificial world built from pieces of countless planets.

The KeyForge Mass Mutation Two-Player Starter Set provides you with all the tools you need to either begin or expand your adventures on the Crucible, including two unique Worlds Collide Archon Decks, a Quickstart Rulebooktwo poster playmats, and all the keystokens, and chain trackers you and your opponent need to start playing!


  • 2 Worlds Collide Archon Decks
  • Quickstart Rules
  • 2 Poster Playmats
  • Keys, Tokens, Chain Trackers 


Players: 2
Ages: 14+
Runtime: 15 - 45m
Designer: Richard Garfield