> For the complete documentation index, see [llms.txt](https://spirit-cards.gitbook.io/spirit-cards-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://spirit-cards.gitbook.io/spirit-cards-docs/welcome.md).

# Spirit Cards

> **Collectible creature cards you *****mine*****, not buy.** Real proof-of-work, deterministic rarity derived from an on-chain seed, escrow duels on a stake, a staking vault that shares a slice of real fees, and an on-chain activity leaderboard.
>
> On-chain name: **Spirit Cards** (`SpiritCards`) · ticker: **SPC** Network: **Robinhood Chain** (an Arbitrum Orbit L2; mainnet `chainId 4663`, gas in **ETH**). Current live stack: **t9 on mainnet `chainId 4663`** (live since **2026-10-05**).

Spirit Cards is a game and an experiment. There is **no token**, no liquidity pool, and no promise of profit. Cards are earned by doing work, then traded, merged, wagered, and staked. Everything that looks like a payout is **a share of the real fees the project actually collects** — and that share can go to zero. Points have **no monetary value**.

***

## The loop

```
挖 MINE → 熔 MERGE → ⚔ BATTLE → 押 STAKE → 榜 POINTS → repeat
```

| Node         | What you do                                                   | What happens                                                                 |
| ------------ | ------------------------------------------------------------- | ---------------------------------------------------------------------------- |
| **挖 MINE**   | Find a valid `nonce`, pay the era price                       | You receive a card with stats + 1 chip (a chip gives −30% on your next mint) |
| **熔 MERGE**  | Burn 2 cards                                                  | You get 1 card of a higher level (a small chance the merge is a "dud")       |
| **⚔ BATTLE** | Escrow a card + ETH against another card                      | Winner takes the pot minus rake; loser loses 1 of 3 lives (❤)                |
| **押 STAKE**  | Lock a card in the vault for 0 / 7 / 30 / 90 / 180 / 365 days | Earn a weight-based share of the pool; a staked card can still fight         |
| **榜 POINTS** | Play and compete                                              | Accumulate on-chain activity points; seasonal leaderboard                    |

***

## At a glance

| Property                          | Value                                            |
| --------------------------------- | ------------------------------------------------ |
| Chain                             | Robinhood Chain (Arbitrum Orbit L2)              |
| Mainnet chainId                   | `4663`                                           |
| Gas token                         | ETH                                              |
| Block time                        | \~100–250 ms                                     |
| On-chain name / ticker            | Spirit Cards / `SPC`                             |
| Total supply (base)               | **8888** (`maxSupply`)                           |
| Species                           | **16** (8 universal + 8 dragons)                 |
| Rarities                          | 6 — N / R / SR / UR / SSR / Prism                |
| Elements                          | 4 — Ember, Stone, Gale, Tide                     |
| Skills                            | 6 — none, Crit, Shield, Pierce, Precision, Vigor |
| Mining difficulty                 | `baseBits = 20`, +0.33 bit per price-era         |
| Starting price                    | `0.00037 ETH` (≈ $1 at ETH ≈ $3000)              |
| Price step                        | +25% per era (`priceStepBps = 2500`)             |
| Era size                          | **1111** cards → **8 eras** (8 × 1111 = 8888)    |
| Merge                             | 2 → 1, fee `0.00002 ETH`, 7% chance of a "dud"   |
| Staking tiers                     | 6 (1× … 40× weight)                              |
| Battle                            | open escrow duel, 3 lives, 10% rake              |
| Points (mine/merge/stake/pvp win) | 1 / 2 / 2 / 3                                    |
| Native token                      | **None — ETH only**                              |

***

## Start here

* [**Introduction**](/spirit-cards-docs/introduction.md) — what Spirit Cards is and how to think about it
* [**The collection**](/spirit-cards-docs/introduction/the-collection.md) — 8888 cards, 16 species, determinism from the seed
* [**Creatures, elements & rarity**](/spirit-cards-docs/introduction/creatures-elements-and-rarity.md) — the stat system
* [**Getting started**](/spirit-cards-docs/introduction/getting-started.md) — connect a wallet, mine your first card
* [**Mining**](/spirit-cards-docs/mining.md) — real PoW, difficulty, cooldown, chips
* [**Economy**](/spirit-cards-docs/economy.md) — price ladder, packs, staking, merge, revenue split, referrals
* [**Battle**](/spirit-cards-docs/battle.md) — elements, skills, damage resolution, lives, rake (this is the deep section)
* [**Gameplay**](/spirit-cards-docs/gameplay.md) — points, leaderboard, seasons
* [**Project**](/spirit-cards-docs/project.md) — contracts & addresses, security, official links, FAQ, roadmap, glossary

***

## No promises

> \[!WARNING] Spirit Cards is a **game / experiment**, not an investment.
>
> * **No APY, no guaranteed return, no "payback period".** Any reward described here is a **share of real fees the project actually collects**, and it may be small or zero.
> * **Points have no monetary value** and confer no claim on anything.
> * **Battle is zero-sum gambling** (players vs. players, plus a rake): you can lose both ETH and the card you wagered.
> * **Card value can fall to zero.** Minting costs real ETH and gives you a game item.
> * This documentation is **informational**. It is not financial, legal, or tax advice.

See the full [Legal disclaimer](/spirit-cards-docs/project/legal-disclaimer.md).

***

*Tags used across these pages: `[proven]` = verified in code / on-chain · `[assumed]` = inference or estimate · `[planned]` = not yet shipped.*


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