How to Play Eternal Decks

What you are trying to do

Eternal Decks is cooperative. Each player begins with a very small personal deck and a three-card hand. On every turn you must use at least one card through one of the game’s legal actions. If a player reaches a required turn and cannot use a card, the group loses.

The way you stay alive is by reviving Eternals. Completing a Field row can award that Eternal’s eight-card deck to the player who completed the revival. That solves one deck-pressure problem but creates another: the revived Eternal also introduces a curse that can restrict future Field placements.

Stage A ends in victory when the group gains four Stars. Stages B–F use their own objectives, so treat Stage A as the tutorial for the shared machinery rather than as a universal scoring sheet.

Stage A setup in practical terms

Follow the fourth-edition rulebook diagram for the exact component layout. The important structure to understand before starting is:

• three Field rows, each with a Field card that controls how numbers or colors may be placed;
• Eternal decks waiting at the ends of those rows;
• a River below the Field for flexible card disposal and Jewel generation;
• Stars and Jewels that track Stage A progress and curse removal;
• a five-card Starting Deck for each player;
• two Communication Discs per player.

Each player shuffles their five-card Starting Deck, draws three cards, and keeps the remainder face down as their Player Deck. Decide a starting player, then proceed clockwise.

Your turn: choose one action

On your turn, perform one of the game’s three main actions:

1. Play a card. This can mean placing a number card in the Field, playing a card to the River, or using an Ability Card in the location its effect requires.
2. Generate a Jewel. Use cards from your hand that satisfy one of the available Jewel recipes, then place those used cards into the River and give the Jewel to a revived Eternal.
3. Give a card to a teammate. Follow the rulebook restrictions for passing a card rather than treating hands as freely shared resources.

The most important survival rule is simple: your turn must consume at least one card. You cannot pass just because the group would prefer to wait.

How Field placement works

When you play a number card to the Field, choose one row and place it in the leftmost empty space. You cannot rearrange cards after seeing a later draw.

Two common placement restrictions apply unless a specific effect overrides them:

• adjacent cards in the same row cannot share the same color;
• adjacent cards in the same row cannot share the same number.

Then apply that row’s Field-card rule. In the Stage A teaching setup, Mountain builds upward in number, Cave builds downward, and Camp is the more flexible row because it does not add an extra number-order restriction beyond the common adjacency rules.

Example: if Mountain currently ends in a blue 4, a red 6 could be legal because it is a higher number and differs in both number and color. A blue 6 fails the color rule; a red 4 fails the number rule; a red 3 fails Mountain’s ascending rule.

Two-color and Rare cards

Two-color cards are not automatic wild cards. Their orientation matters when they are placed in the Field, and the colors shown on their left and right edges matter for adjacency. Choose the orientation before placement; do not rotate the card later because a future play would be easier.

Rare cards are much more flexible: for placement purposes they can stand in for colors and numbers as allowed by the rules, and Rare cards may sit next to one another. That flexibility makes them valuable for rescuing tight Field rows, so spending one simply because it is legal is not always efficient.

Playing to the River

The River is the game’s pressure-release valve. A normal card played to the River does not follow the Field’s adjacency or row-order rules, and a card blocked from the Field by a curse can still be playable to the River.

When the fifth card is played to the River, resolve the River Bonus. In the normal Stage A flow, the active player gains the available River Rare card, then the River cards are moved to the discard area. If the bonus supply is exhausted when the River Bonus must be taken, the Game Over card can end the game immediately.

This creates a second countdown. The River helps you avoid a dead hand, but repeatedly filling it consumes a limited safety resource.

Generating a Jewel

Instead of simply placing one card, you may use the required cards from your hand to complete a Jewel recipe. Those cards are then played into the River, and the matching Jewel is given to a revived Eternal that does not already have one.

Covering the Eternal’s curse icon with a Jewel breaks that curse. The timing decision matters: a revived Eternal may be providing a badly needed eight-card refill to one player while its curse makes several teammates’ hands less playable.

Cards used to generate a Jewel still affect the River. It is possible for Jewel generation to bring the River to five or more cards; resolve the River Bonus and clear it according to the current rulebook.

Reviving an Eternal

When a player fills the last required space of a Field row and reaches the Eternal at the end, that player revives the Eternal. The exact cleanup follows the rulebook, but strategically three things happen at once:

1. the completing player receives that Eternal’s eight-card deck beneath their personal deck;
2. the completed Field row is cleared as directed;
3. the Eternal’s curse becomes active until a Jewel removes it.

Because only the player who completes the revival receives the deck, the group should not treat row completion as a race for personal benefit. The better question is: who most urgently needs eight more cards?

Communication Discs and legal discussion

Eternal Decks is a limited-communication game. Communication Discs let players indicate intended placement areas without freely announcing the exact numbers and colors in hand.

The current rules distinguish between discussing public information and revealing hidden hand information. In practical terms, communicate the plan—such as which row should be advanced or which player should receive the next revival—without turning the game into open-hand optimization.

The discs are especially useful for sequencing two or three upcoming turns. A legal placement now can be bad if it removes the only space the next player can use.

Draw and deck pressure

Your small Starting Deck is not a timer that resets automatically. As cards move from hand to the Field, River and discard area, your remaining future turns shrink. Revivals extend one player’s deck, but not everyone’s.

Before completing a row, check the whole table’s runway:

• Who has the fewest cards left in deck and hand?
• Who can actually place the final card?
• Will the new curse make another player unable to act?
• Can the group create the Jewel needed to remove that curse soon?

This is the central cooperative puzzle: survival, revival and curse management are one problem, not three separate systems.

How Stage A ends

Stage A’s target is four Stars. You can earn Stars from the Stage A systems described in the rulebook, including progress tied to revivals, Jewels and other marked areas. Do not import later-stage Key conditions into Stage A.

If the group reaches the stage objective, it wins. If a player cannot legally use a card on a required turn—or another explicit loss condition triggers first—the group loses. When an edge case appears, use the fourth-edition file rather than an older printing because the designer has continued updating the English rules.

First-game checklist

• Place Field cards from left to right; do not leave gaps.
• Check both common adjacency rules and the current row’s Field-card rule.
• Do not treat two-color cards as unrestricted wilds.
• Remember that curses block Field use, not necessarily River use.
• Track River Bonus depletion; the River is not an infinite discard pile.
• Plan who should receive the next Eternal deck before the row is one card from completion.
• Use Communication Discs to protect the next player’s legal move.
• Learn Stage A first, then read each later Stage’s objective before setup.

Sources and scope

Checked 6 October 2026 against Hiroken’s designer-uploaded English rulebook listing, updated June 22, 2026 with the fourth-edition files, plus the searchable Eternal Decks rulebook reference. This article paraphrases the system and uses original worked examples; it does not reproduce stage sheets, player aids, card lists or proprietary tables. Editorial policy and corrections.