claudium
Card Idle
A dark fantasy idle deckbuilder. Most idle games ask you to buy a bigger number. This one asks you where to put things. Nine slots, 113 cards, and every card changes the ones beside it.
Rearranging is the game. The number in the corner is just the score.
Every card argues with its neighbours
A Candle Stub lifts whatever it touches. A Miser's Curse drags its neighbours down. A Ley Line pushes its whole row. The Weeping Saint takes a curse aimed at the card beside it and turns it into a blessing instead. Nine slots is not many, and that is the point.
Cards that do more than add up
The Old Oak pays you for leaving it alone and resets the moment you move it. The Black Mirror copies whatever your best card earns. The Volcano summons Fissures into its own row. Three cards make you choose what they do when you put them down — and let you change your mind later.
Sixteen tags that read each other
Beasts, relics, crooked officials, standing stones, things in jars. A board of Farms plays nothing like a board of Cursed. Challenges ask you to fill every slot with a single tag and hit a rate; clear one and that tag is permanently stronger, and they stack.
Prestige when the board runs dry
Wipe everything and keep the points. They buy upgrades that never stop scaling, and prestige packs — the only place the rarest cards live.
It idles properly
Earns while the tab is shut, up to eight hours. Saves as you go. No account, no ads, nothing to buy.
Nothing is hidden from you.
Hover any card and it shows its own working: what it earns on its own, what each neighbour is adding or taking away, and what it is worth as it currently sits. A board that surprises you is a board you can take apart.
113 cards.
Thirty-two common, thirty-five rare, twenty-three epic, eighteen legendary, and five that only ever come out of a prestige pack. The ones you have not found yet sit in the grid as empty frames, which is its own kind of pressure.
One card at a time.
Packs get more expensive as you open them, so the run is a steady negotiation between buying the next one and letting the board earn a while longer. A card you already own comes back as a spare, and spares are what level it up — nothing is ever wasted.
Forty-eight reasons to rebuild.
Fill the board with one tag, reach the rate, and that tag is stronger for good. Arcane, Beast, Coin, Craft, Criminal, Cursed, Earth, Farm, Guard, Light, Nature, Relic, Royal, Structure, Trade, Treasure — each with three tiers, and the bonuses stack.
| Platform | Browser — nothing to install, click and play |
|---|---|
| Price | Free. No account, no ads, nothing to buy |
| Cards | 113, across five rarities · 16 tags · 6 summon tokens |
| Offline | Earns with the tab shut, up to eight hours |
| Saves | In your own browser |
| Status | In development — playable end to end, balance still being tuned |
| Built with | Claudium Engine |