
Leviathan Wilds: Mutation Pack 2
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- Arrives
- by the end of July 2027
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The FroGames review
Climb aboard the Weaver once again. But this time, the webs are moving. The mutation deck changes every leviathan you thought you knew, and no crystal falls the same way anymore.
WHAT IT IS
Every leviathan you know, reinvented
Mutation Pack 2 is the second collection of variants for Leviathan Wilds, designed by Justin Kemppainen and published by Moon Crab Games. Where the first Mutation Pack added 27 cards to the base game, this expansion brings 18 new mutation cards specifically designed for the leviathans of Deepvale and Shattered Peak, the game's two environmental expansions.
Mutations radically alter leviathan behavior: different movements, unprecedented attack patterns, modified victory conditions. Each card can be combined with any compatible leviathan, multiplying the possible configurations. It's not extra content to fill the box: these are unprecedented challenges for those who have already scaled all the creatures and are still looking for an adrenaline rush.
What they say abroad
"Leviathan-themed gameplay variants: countless new leviathan and mutation combinations for Deepvale and Shattered Peak."
— Moon Crab Games
Mutation Pack 2 is designed for those who have already gotten their hands on Deepvale and Shattered Peak. If you don't own them, this expansion remains locked in the deck. First read, October 2026.
— FroGames
Leviathan Wilds: Mutation Pack 2
The base game officially supports solo play, and the mutations work identically: no rules change. The experience remains complete, but obviously without the multi-player cooperative coordination.
What's inside
18 ways not to take anything for granted
Deepvale mutation cards
Variants dedicated to the leviathans of the Deepvale expansion: new patterns, modified attacks, surprise conditions. Each card is designed for that biome.
Shattered Peak mutation cards
The same for the leviathans of Shattered Peak. Creatures that seemed predictable become unpredictable again: unprecedented movements, altered timing.
Cross-compatibility
Some mutations work on multiple leviathans of the same environment. Choose which one to apply before starting: the combination changes the game.
Modular difficulty
Not all mutations have the same impact. Some only complicate one phase, others overturn the entire strategy. Scale as you prefer.
🎲How to PlayThe rules in four steps▼
How mutations work
Mechanical integration
Mutations do not replace the Leviathan Wilds rules: they modify them at specific points.
Before opening the book to the chosen Leviathan, draw (or choose) a compatible mutation card. Read the effect: it will be active for the entire game.
Each mutation card specifies what changes: an attack pattern, a movement condition, a damage trigger, a crystal rule. Integrate that rule into the normal flow.
The turn proceeds as in the base rules. But when the mutation triggers (for example, "every time the Leviathan attacks" or "at the start of the round"), you apply the modified effect.
For even more extreme challenges, some configurations allow you to activate multiple mutations at the same time. Each card adds a layer of unpredictability.
⏱️Your first gameThe play-by-play chronicle▼
A mutated game in five moments
What happens at the table (with an active mutation)
Not the rules. The experience.
Deceptive setup
Open the book to the Leviathan you have already beaten three times. Shuffle the character deck as usual. Then draw the mutation card and read: "The Leviathan moves 2 spaces every round". You realize that the climb you knew no longer exists.
First impact
The first round starts and the mutation comes into play. The Leviathan behaves differently: an attack comes from an unexpected side, a mechanic you took for granted now works in reverse. Plan A doesn't hold up.
Recalculating on the fly
Halfway through the game. The team improvises: "If it moves like that, we need to get ahead of the crystals", "No wait, with this mutation it's better to break the blue one first". The Leviathan is the same, but the priorities are flipped.
The mutated critical moment
The turn arrives that you solved with your eyes closed in previous runs. This time the mutation triggers a condition you hadn't anticipated: a player falls, a crystal regenerates, the timer accelerates. What you knew is no longer enough.
Unprecedented victory (or defeat)
When the last crystal falls or when the Leviathan eliminates you, the feeling is different. You have beaten a Leviathan you thought you knew, or lost against a version you had never faced. In both cases: "Shall we try another mutation?"
🐸Good to know beforehandThree honest things, from friends▼
Good to know beforehand
Three honest things
Requires the environment expansions
Mutation Pack 2 works ONLY with Deepvale and Shattered Peak. If you don't own at least one of the two, these cards remain unusable. It is not material for the base game.
It raises the difficulty, it doesn't lower it
Mutations are designed to make Leviathans you may have already beaten more challenging. If you are still learning the game or losing regularly, adding mutations only makes the situation worse.
Variability but not narrative content
They are mechanical cards, not scenarios. There is no new story, new artwork, or additional Leviathans. Only behavior modifiers. If you are looking for new creatures to climb, you need other expansions.
🏆Victory and defeatWhat the ending rewards▼
How it ends
Victory and defeat (unchanged)
Mutations change the path, not the final conditions. You win and lose as in the base game.
Victory
- Destroy all binding crystals on the Leviathan (standard condition)
- Survive the mutations applied during the game
- Complete the objective within the team's grip/health limits
Defeat
- All players run out of health or fall permanently
- The Leviathan completes its escape sequence (if provided for in its rules)
- The mutation triggers a specific game over condition (rare but possible)
This pack does not add Leviathans. It adds hundreds of ways to face the ones you already have. And this, for those who have cleared Deepvale and Shattered Peak, is worth more than new creatures.
💬Frequently Asked QuestionsQuick answers before you add to cart▼
Frequently Asked Questions
FAQ on Leviathan Wilds: Mutation Pack 2
Do you need the base game to use Mutation Pack 2?
Yes, you need the base Leviathan Wilds plus at least one of Deepvale and Shattered Peak. These mutations are designed for the Leviathans of those environment expansions, not for the base game.
How many cards does this expansion contain?
18 mutation cards in total, divided between variants for Deepvale and Shattered Peak. Each card can be applied to specific Leviathans or compatible ones from the corresponding environment.
Can I use multiple mutations at the same time?
Technically yes, but each additional mutation drastically raises the difficulty. The standard mode provides one mutation per game. Combining two or three is for experienced players looking for extreme challenges.
Do mutations change the base rules of the game?
No, they only modify specific Leviathan behaviors (attack patterns, movement, event triggers). The game flow, climbing mechanics, and victory conditions remain identical.
Does it work in solo mode like the base game?
Yes, no difference. Mutations apply the same way in both solo and cooperative play. There are no special rules for solo mode.
How much does the difficulty increase compared to a standard game?
It depends on the drawn mutation. Some add tactical complexity without increasing damage, others make the Leviathan more aggressive or unpredictable. On average, expect a challenge level higher than a standard run.
Can I use mutations from Pack 1 together with those from Pack 2?
Pack 1 mutations are designed for the base game, Pack 2 for Deepvale and Shattered Peak. Technically you can combine them if a Leviathan is compatible, but always check the conditions indicated on the cards.
Is there a recommended order for introducing mutations?
Moon Crab Games recommends playing each Leviathan at least once without mutations, then adding one on the second run. Only when you are familiar with all the creatures should you move on to multiple combinations.
Do the cards have text in English? Do you need to know the language?
This edition is in English. You need to understand the text on the mutation cards to correctly apply the variants. The base Leviathan Wilds game already has a moderate language dependency, mutations maintain the same level.
The people behind the game
Who invented it, who designed it, who publishes it — and what else they have done.
Leviathan Wilds: Mutation Pack 2 is a 1 to 4 player expansion for the cooperative boss battler by Justin Kemppainen, published by Moon Crab Games. It contains 18 mutation cards that modify the Leviathans of Deepvale and Shattered Peak, the game's two environment expansions. Each mutation alters attack patterns, movements, or game conditions, multiplying the replayability for those who have already climbed all the creatures. Unchanged duration of 45-90 minutes, age 10+, cooperative hand management and tactical movement mechanics. Requires the base game and at least one of the two compatible expansions. Available on FroGames.it.

Leviathan Wilds: Mutation Pack 2
Frequently Asked Questions
The answers you're looking for, no beating around the bush.
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📦Does the content of the box match what is indicated?
We always strive to provide the correct content, but minor variations are possible due to reprints or updates. The information comes directly from the publishers. If you have any questions, please contact us!
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