Immutable X Explained: The NFT-Specific Layer 2 (2026 Guide)

Immutable X was a layer-2 network on Ethereum built for NFTs and blockchain games. It was created by Immutable, an Australian studio best known at the time for the trading card game Gods Unchained, and it opened to the public in 2021, when NFT trading on Ethereum mainnet was often priced out by gas fees.

The core idea was simple. Mint and trade on a separate layer, and use Ethereum as the settlement layer that secures ownership. Players and collectors could buy, sell and transfer NFTs without paying a gas fee on each action, and trades confirmed almost at once instead of waiting for Ethereum blocks.

The phrase "NFT-specific blockchain" is accurate in a narrow technical sense. Immutable X was not a general smart-contract platform where anyone could deploy any code. It exposed a defined set of operations: minting, trading, transferring and withdrawing assets. That made it fast and cheap for its target use, but it also meant developers could not build DeFi protocols, lending markets or custom on-chain logic there.

It helps to treat Immutable X as the first chapter of Immutable's technology stack. Immutable's documentation describes it as the company's first rollup, now merged into Immutable Chain as of early 2026. That makes this topic partly history and partly a practical question: what exists today, and what should a holder of Immutable X assets do about it.

This guide covers how the network worked, why the NFT focus mattered, what the IMX token does, which games used it, how it compares with other options, and how to verify its current status safely.

Immutable X was built on technology from StarkWare, the company behind the StarkEx scaling engine. Rather than running every transaction on Ethereum, the network executed trades off-chain, bundled large batches together, and posted a cryptographic validity proof to Ethereum. Ethereum verified the proof, which confirmed that the batch followed the rules without re-running each transaction.

Why trades cost users no gas

Because thousands of actions shared a single proof, the per-transaction cost fell sharply. Immutable chose to absorb that cost and cover it through protocol fees charged on trades rather than gas charged to the user. For collectors, the experience was closer to a web app than a typical Ethereum transaction: no gas estimates, no failed transactions, no waiting.

Self-custody of assets

Users kept control of their NFTs through a wallet. Immutable X used a registration step that linked an Ethereum wallet to a layer-2 key. Assets could be withdrawn back to Ethereum mainnet, which is the key security property of a layer 2.

A note on data availability

Immutable described the network as a ZK-rollup in its marketing. Technical write-ups often point out that StarkEx systems can store transaction data off-chain under a committee instead of fully on Ethereum, which is closer to a validium design. The practical difference is the trust assumption: with off-chain data, users depend partly on the data being available to exit. If this matters to you, read the technical documentation instead of relying on summaries.

What it could not do

The fixed set of operations kept things fast and predictable, but it meant no arbitrary smart contracts. That limitation is a large part of why Immutable moved towards a general-purpose chain.

NFTs behave differently from fungible tokens, and early Ethereum handled them poorly. A single game session can involve dozens of small asset actions: opening a pack, crafting an item, listing it, transferring it to a friend. On mainnet, each step carried a gas fee that could exceed the value of the item.

Immutable X tackled this by designing around the NFT lifecycle instead of around general computation.

• Minting at scale. Studios could mint large numbers of assets in batches, which matters when a game releases thousands of items at once.
• Instant trades. A marketplace sale settled quickly, so players did not have to wait for confirmations before using an item.
• Predictable fees. Trading fees were set as protocol and marketplace percentages, not as variable gas costs, so a studio could model its economics.
• Royalties. Creator royalties could be enforced at the protocol level for trades made through the network, rather than left to each marketplace to honour.
• Shared liquidity. Games on the network could list items in a common orderbook, so a new game did not need to build its own marketplace from scratch.

The trade-off was flexibility. A purpose-built system optimises for a narrow job, and game studios increasingly wanted to run their own contracts: crafting systems, staking, in-game economies and token mechanics. Those need an EVM-compatible environment.

This tension between a specialised NFT layer and a general-purpose chain explains Immutable's later direction. Its newer chain keeps the gaming focus, but supports standard smart contracts so developers can use familiar Ethereum tooling and wallets.

IMX is an ERC-20 token associated with the Immutable ecosystem. On Immutable X it was used for staking, governance and fee-related functions. On Immutable zkEVM, the newer chain, IMX serves as the gas token, which is the main reason it still matters after the older network's merge.

Typical roles of IMX

Function	What it means
Gas	Pays for transactions on Immutable zkEVM
Staking	Locking tokens to take part in the ecosystem's reward and security mechanisms
Governance	Voting rights on proposals
Fees	Used in parts of the marketplace and protocol fee design

The exact mechanics, reward structures and fee splits have been revised over time, so treat any single article, including this one, as a starting point and read the current official documentation before relying on them.

Where to check current numbers

Supply, circulating amount, price, market capitalisation and staking returns change continuously. Use a reputable market data aggregator for price and supply, and the official Immutable documentation and token pages for how staking and governance operate. If a site quotes a staking yield as if it were fixed, be cautious. Yields depend on conditions that shift.

Buying and holding

IMX is listed on several centralized exchanges, and some of the exchange options on this site, such as OKX, Bitget and Gate, are examples of platforms that list many tokens. Availability varies by country and changes over time, so confirm that a venue lists IMX and serves your region before you deposit. Tokens like IMX are volatile and tied to a single ecosystem's fortunes, so size any position accordingly.

Immutable X attracted games and marketplaces before most other NFT-focused chains did, mainly because gas-free trading suited collectible card and item economies.

Well-known titles

• Gods Unchained. A digital trading card game from the same team that built the network, and the flagship example of cards as tradable NFTs.
• Illuvium. A fantasy creature-collecting game that launched in the Immutable ecosystem before expanding its technology choices.
• Guild of Guardians. A mobile role-playing game built around tradable heroes and items.

Game availability, support and tokens change over time. Some studios have shifted to other chains or ended projects, so check a game's own channels for its current status instead of assuming a title is active.

Marketplaces

Immutable operated its own marketplace experience, and third-party marketplaces plugged into the shared orderbook. The orderbook approach meant a listing could be surfaced in several places, which improved liquidity for items from smaller games.

Developer tools

Immutable built a wider toolkit around the chain. Passport is a wallet and login system aimed at players who have never used crypto. Minting and orderbook tools handle asset creation and trading, and a toolkit lets users transfer items between wallets on the newer zkEVM. The goal was to hide wallet complexity so a player can enter a game without first learning about seed phrases.

Reality check

NFT gaming has had uneven demand since the 2021 to 2022 peak. A technically strong chain does not guarantee active players or valuable items, so judge games on their gameplay and player base, not on the chain they run on.

Immutable's strategy moved from a specialised NFT layer to a general-purpose gaming chain. Immutable zkEVM is an EVM-compatible network launched in 2024, developed with technology from Polygon Labs. Because it runs standard Solidity contracts, developers can use familiar Ethereum tools and add custom logic that was impossible on Immutable X.

Main differences

	Immutable X	Immutable zkEVM
Design	NFT-focused, fixed operations	General-purpose, EVM-compatible
Smart contracts	Not supported	Supported
Gas token	None for users on trades	IMX
Tech base	StarkWare StarkEx	zkEVM technology with Polygon Labs
Status	Merged into Immutable Chain in early 2026	Continuing chain

What the merge means

Immutable's documentation states that Immutable X was merged into Immutable Chain in early 2026, and that the status of NFTs on Immutable X depends on the details laid out on its deprecation page. In plain terms, the older network is no longer the place where new activity is meant to happen, and the company has consolidated around one chain.

The exact treatment of each asset, whether it moved automatically, requires a user action, or has a deadline, is something to confirm directly in the official documentation. Details like these vary by game and by how assets were held, and a general article cannot cover every case.

Why it matters for IMX holders

The IMX token's utility is now centred on Immutable Chain, where it pays for gas. That ties the token's demand to activity on that chain rather than to the older network.

If you bought NFTs or tokens during the Immutable X period, a short, careful checklist is better than a rushed one.

1. Identify where your assets are. Open your wallet and the game or marketplace you used. Note which wallet address holds the items and whether they appear on the older network or on Immutable Chain.
2. Read the official deprecation page. Immutable's documentation sets out what happens to Immutable X assets and whether you need to do anything. Rely on it over social media posts.
3. Confirm game-specific steps. Some studios handle their own migrations. Check the game's official announcements, reached through channels you already trust.
4. Keep your wallet access safe. Store your seed phrase offline. If a hardware wallet was linked to your account, keep it available.
5. Move assets only through official tools. For zkEVM transfers, use the official toolkit and check the network and contract addresses before signing.
6. Decide what to do with IMX. Holding, staking or selling is your choice, and none of it is advice. Check current staking terms before locking tokens.

Bridging and swapping

If you need to move value between Ethereum, other layer 2s and Immutable Chain, bridge protocols such as Across and messaging layers like LayerZero V2 and Chainlink CCIP exist for cross-chain transfers in general. Support for any specific chain changes, so confirm that a bridge lists Immutable Chain before sending funds, and test with a small amount first.

Do not rush because of a deadline you read about on a social feed. Deadlines in official documentation are the only ones worth acting on.

Immutable X lowered costs for NFT users, but it carried risks that apply to this category of project.

Technical and trust risks

• Data availability. As noted earlier, StarkEx-based systems may rely on a committee for data, which adds a trust assumption compared with fully on-chain data.
• Operator dependence. Layer 2s run by a single company often depend on that company for sequencing and upgrades. Consolidation, like the 2026 merge, shows how a platform's roadmap can change the status of what you hold.
• Smart-contract limits. No arbitrary contracts meant limited composability with DeFi.

Market risks

• Game and NFT demand. Item values depend on active players. A game losing its community can leave collectors with illiquid assets.
• Token volatility. IMX and game tokens can move sharply and are exposed to sentiment about the sector.
• Fee and policy changes. Marketplace fees, royalties and staking terms can be revised.

Scam risks

Migration periods attract phishing. Common patterns include fake airdrop claims, impersonators offering migration help, and cloned marketplace sites. Defensive habits that help:

• Never share your seed phrase, and never type it into a website.
• Bookmark official sites and apps rather than searching each time.
• Read each transaction prompt in your wallet, especially approvals that give a contract permission to move all your NFTs.
• Revoke token and NFT approvals you no longer need.

NFTs and crypto are highly speculative, and you can lose everything you put in. If an in-game item feels like a gamble, treat it as one. Some game economies also include chance-based mechanics such as packs or loot boxes. These may be regulated differently by country and are for adults only, so check your local rules.

Immutable X was one of several approaches to making NFTs affordable. Comparing them shows what was distinctive and what has become common.

Approach	Examples	Strengths	Trade-offs
NFT-specific layer 2	Immutable X	Gas-free trades, fast, built-in marketplace tools	No general smart contracts, company-run
General-purpose layer 2	Arbitrum, other rollups	Full smart contracts, DeFi access	Users still pay small gas fees
Gaming-focused EVM chain	Immutable zkEVM	EVM tooling, gaming focus, IMX gas	Depends on game adoption
Alternative layer-1	Solana and others	Low fees, fast	Separate ecosystem from Ethereum

Why general-purpose won out

Fees on Ethereum layer 2s fell sharply during the following years, which reduced the cost advantage that NFT-specific designs once had. At the same time, developers wanted the freedom to write their own contracts. As a result, most new gaming and NFT projects now choose EVM-compatible environments, including Immutable's own newer chain.

What Immutable X still contributed

Its lasting influence is in product ideas rather than the specific network: gas-free or gas-abstracted user experience, wallets that feel like a normal login, shared orderbooks and protocol-level creator royalties. These ideas appear in later chains and in Immutable's current tools.

Choosing today

If you are a player, pick based on the game. If you are a developer, weigh tooling, user onboarding, liquidity and the stability of the platform's roadmap. If you are a collector, consider whether the items can be moved or sold easily on the chain where they now live. Moving funds between networks usually involves a bridge such as the Arbitrum Bridge for Arbitrum or a cross-chain protocol for others, plus swaps on a DEX like Uniswap.

Because the status of Immutable X has changed, verify details at the source instead of relying on older explainers. Many pages written in 2021 to 2024 describe the network as live, and some third-party sites still do.

A short verification routine

1. Check the date. If an article describes Immutable X as the current flagship network without mentioning Immutable Chain or zkEVM, it is probably out of date.
2. Go to the official documentation. Immutable's documentation includes a deprecation page explaining the merge and what it means for assets held on the older network.
3. Confirm tokens and contracts. Verify the IMX token contract address through the official docs and a block explorer before buying or approving anything.
4. Cross-check with the game. Games usually publish their own migration or support notes.
5. Test small. When moving assets or funds, try a small amount first and confirm that it arrives.

Using this information safely

Exchanges and wallets may list IMX and related assets, but listing does not mean endorsement or suitability. Platforms differ by region, regulation and supported networks, so confirm that your chosen venue serves your country and supports the network you intend to use. Where gambling-style mechanics exist in a game, such as random packs, you must be 18 or older in most places, and local laws apply. Follow them, and do not try to bypass age checks, identity verification or regional restrictions.

Bottom line

Immutable X proved that gas-free NFT trading was possible and shaped how later gaming chains approached user experience. As a standalone network it has been folded into Immutable Chain. For a reader today, the useful question is no longer how to use Immutable X, but how to safely handle assets, tokens and games that came from it.