Mass Mutation

Mass Mutation

Houses:

Set Number:

4

Symbol:

Released:

May 29, 2020 (China and Taiwan)
July 8, 2020 (South Korea)
July 10, 2020 (Global)

Cards:

422

New Cards:

259

Design and Development:

Brad Andres, Daniel Schaefer, Aaron Haltom

Languages:

12 - English, French, German, Italian, Polish, Portuguese, Spanish, Simplified Chinese, Traditional Chinese, Thai, Russian, Korean

Preceded by:

Worlds Collide

Followed by:

Dark Tidings

Mass Mutation is the fourth and current KeyForge set, announced in a FFG live stream on January 30th, 2020 and released on May 29, 2020 in China and Taiwan and July 10, 2020 globally. It includes 259 new cards, for a total of 422 cards. It is the first set completely designed by the FFG design team, with Richard Garfield involved only in an advisory role. House Sanctum is returning after being absent from Worlds Collide, but house Brobnar is rotated out for the first time. While Sanctum is returning to Mass Mutation, it has a slightly different flavor from Sanctum in previous sets.

The core theme of the set is mutation, with many creatures returning in a mutated form and other abilities influencing or referring to Mutant creatures. This is the first KeyForge set to be based on a story; the mutations happen after two battling archons open a vault and discover blue-black Æmber. Many of the Mutants in the set will have artwork that feature the blue-black Æmber theme. One Anomaly from Worlds Collide, Orb of Wonder, appears in its original house in this set, but there are no new Anomalies. Mass Mutation does not require any new tokens.

House Rotation

• Returning: Sanctum
• Rotated Out: Brobnar

Sanctum returns after a single set absence in Worlds Collide, and Brobnar rotates out for the first time — not returning until Winds of Exchange.

New in This Set

Enhance and New Bonus Icons

Mass Mutation introduces the Enhance keyword. Unlike other keywords that have an effect in gameplay, the Enhance keyword modifies cards when the deck itself is generated, further driving the uniqueness of each deck. A card with the Enhance keyword will add bonus icons to any other card in the deck.

These bonus icons can be Æmber, capture, damage, and draw. The Æmber icon provides an extra Æmber when the card is played, and the capture icon allows the player to capture onto a friendly creature. Damage icons deal one damage to a creature, and draw icons draw a card. These are resolved in the same step as the printed Æmber bonus on cards, and icons are resolved from top to bottom. Each card can have a maximum of 5 bonus icons, which includes normal Æmber bonuses on cards. A card that has been enhanced with a bonus icon is printed with a different color on the decklist, but exactly which bonus icons are added to which cards is not visible from the decklist.

Gigantic Creatures

Deusillus, Saurian's Gigantic Creature in Mass Mutation

Mass Mutation also introduces three gigantic creatures that are comprised of two cards that must be played together. Once in play, they are considered to be a single creature. For example, players can play a gigantic creature on their first turn even though they require two cards. The three gigantic creatures are Deusillus, Ultra Gravitron, and Niffle Kong. Every deck that contains one of these gigantic creatures will also contain the It’s Coming... card that allows players to search for either half of the creature from their discard pile or deck.

Mutants

Mass Mutation also features Mutant versions of familiar cards. One example is the new card Rad Penny. This card is a newer, mutated version of the card Bad Penny from the first three sets. Instead of its original traits Human and Thief, Rad Penny has the traits Mutant and Thief along with new Play: and Destroyed: effects. The dark colored Æmber is visible in Rad Penny's pocket, and many other Mutant cards in the set have similar visual cues to indicate that they are Mutants.

Special Rarity cards

Gigantic creatures always appear as a pair of two cards, although they count as a single creature for the purpose of in-game effects. Every gigantic creature comes with a copy of the It’s Coming... search card in addition to the two creature cards.

Each house in Mass Mutation features a set of 6 Variant Mutant creatures that combine the traits and characteristics of two different houses. For example, house Logos contains Dino-Bot (combining houses Saurian and Logos), Umbra-Bot (combining houses Shadows and Logos), and four other -Bots that merge the characteristics of Logos with another house. House Dis has six creatures that end with -Fiend. In order to reflect which two houses the cards combine, Variant Mutant creatures may gain additional power, card abilities, and/or keywords (like Skirmish or Elusive).

The set also features the Seven Sins cards, a group of seven Special cards that appear in house Dis that all share the Sin trait. A deck that contains the Seven Sins will have between 3-7 of the following cards: Pride, Greed, Wrath, Gluttony, Desire, Sloth, and Envy.

Card Distribution

This table indicates how many cards are in each house of Mass Mutation and how many are of each rarity. The bottom section displays the number of reprints in each house and the set from which they originated.

Rarity								Total
Total	65	61	58	64	58	61	63	422
Common	16	16	16	16	16	16	16	112
Uncommon	16	16	16	16	16	16	16	112
Rare	19	20	20	20	20	20	20	139
Special	14	9	6	12	6	9	11	59
Set of first appearance:
New in MM	40	36	34	44	34	41	38	259
WC	9	9		20	6	20	9	73
AoA	6	4	8		5		7	30
CotA	10	12	16		13		9	60

Products

Name	Model	Description
KeyForge: Mass Mutation Archon Deck	KF09a
KeyForge: Mass Mutation Display	KF09d	Contains 12 Mass Mutation Archon Decks
KeyForge: Mass Mutation Deluxe Archon Deck	KF10	Contains: 1 Mass Mutation Archon Deck Tokens for one player Quick rules insert
KeyForge: Mass Mutation 2 Player Starter Set	KF11	Contains: 2 Mass Mutation Archon Decks Tokens for two players 2 Poster paper playmats Quick rules insert

Print and Play

Fantasy Flight Games also made 4 Mass Mutation decks available as downloadable print and play decks. Because these decks do not have QR codes, they do not appear in the Master Vault and are therefore not tournament legal.

Print and Play Decks

Deck Name	Houses
Rapidly Ever-Changing Sadao
Cyclonium, Chamber Agent
Wu, the Naturalist of Car Keys
Mehitabel, Host of the Hustling Repository

See also

• All cards in Mass Mutation
• Cards with an errata: Pain Reaction
• Deck registration data