Mint a Cromon: Rift tiers and odds

The three Rift tiers

Odds below are the live values enforced on-chain, per rarity.

How the mint works

1. 1

   Choose a Rift tier

   Basic, Premium or Ultra. Higher tiers weight the odds toward Rare, Epic and Legendary Cromons.

2. 2

   Commit on-chain

   Your transaction locks the mint before anyone, including the team, can know the outcome.

3. 3

   The reveal lands

   A few Cronos blocks later the Rift opens: species, rarity and stats are revealed, all provably random.

4. 4

   Your Cromon is yours

   The NFT is minted straight to your wallet and appears in your collection, ready to battle or trade.

What do the stat ranges mean?

A Cromon carries six visible stats, HP, Attack, Defense, Speed, Critical and Resolve, plus two reserved ones held for later mechanics, each on a 30-point scale and written on-chain at the reveal. A Rift makes two independent rolls: the rarity, from the tier's published odds, then every stat inside the tier's band. A Basic Rift rolls each stat between 3 and 24, a Premium Rift between 13 and 28, an Ultra Rift between 20 and 30. The floor is what you buy: an Ultra Cromon cannot come out weak, whatever its rarity. Rarity sets how many Dojo techniques a Cromon can learn, 2 for a Common up to 5 for a Legendary, and its odds of a Cromite drop on expeditions, while the stats are what it does in a fight, which is why a Common from an Ultra Rift can out-fight an Uncommon from a Basic one.

Which tier should I open?

It depends on what the Cromon is for. A Basic Rift at 20 CRO is the cheapest way to fill the 120-species CromonScan and to farm the duplicates the Fusion Forge eats, and most of what it gives is Common or Uncommon. A Premium Rift at 50 CRO guarantees a floor of 13 per stat, which is a fighter you can field in the Arena straight away, with a 25% Rare and 12.5% Epic chance. An Ultra Rift at 150 CRO is the collector's roll: a 10% Legendary chance and a floor of 20, so even its Commons are endgame material. A Rift can be opened for up to 10 Cromons in one transaction, every 20 paid Ultra Rifts earn a free Ultra, and the three starter Cromons every Keeper receives on joining cost nothing.

What happens after the reveal?

The new Cromon appears in your Vault within a minute, with its number, species, rarity, element and the eight stats the contract wrote. From there it can enter the Arena, an expedition, a mine lane, the maze or the Pit right away, one activity at a time. A new species ticks your CromonScan toward the full 120; a duplicate of a species you already own is a step toward a fusion, which needs three of the same species and rarity. If it is not the one you wanted, the Marketplace lists it for another Keeper, with a 5% buyer fee and no seller commission, and the same market is the other way to get a specific Cromon: buy one whose stats you can read before paying instead of rolling for it. Mints also qualify the referral program: once you have minted three Cromons from paid Rifts, the friend who invited you earns 800 Shards, 80 CroCoin and a free mint.