KeyForge: Mass Mutation

The malign influence of Dark Æmber is changing the very fabric of the Crucible.

Mass Mutation, the fourth KeyForge set introduces the wicked Enhancement attribute in which cards may be assigned mutations across, expanding the already vast uniqueness of each KeyForge deck.

In Mass Mutation you'll also find the cool "Big Creatures" in which certain cards are played together to form an extra large creature in your battleline.