Trading in Creatures of Sonaria (CoS) relies on a player-driven economy where the currency is Mushrooms (Mush). Unlike static shop prices, trading values fluctuate based on scarcity, demand, and developer updates. This calculator helps you estimate the fair market value of your creatures before entering the trade realm.
Key Factors Affecting Value
Species vs. Stored: This is the most critical distinction. A Species (Spec) allows you to spawn the creature infinitely. A Stored creature is a single life save slot. Species are typically worth 10x to 100x more than their stored counterparts.
Rarity & Source: Creatures obtainable from the standard Gacha are generally cheap. Limited Gacha creatures, Event exclusives, and Developer creatures command much higher prices due to limited availability. Role Limiteds (like Sigmatox or Aeries) are the most expensive assets in the game.
Demand: Even a rare creature might sell for less if nobody wants to play it. Conversely, a new Tier 5 Behemoth with high stats will often have "Hype" demand, causing prices to skyrocket temporarily.
Traits (Glimmer, etc.): Special traits like Glimmer, Shadow, or Diamond only apply to Stored creatures. These cosmetic effects can add significant Mush value to a single save slot.
Understanding The Tiers
While Tier 5 (Behemoth) creatures are powerful, higher tier does not always equal higher value. A Tier 1 "Keruku" (beta limited) is worth significantly more than a Tier 5 "Kendyll" (standard gacha). However, when selling Stored slots, higher tiers usually fetch a higher price because they take longer to grow.
Trading Tip: Always double-check values in the official trade realm discord or wiki before finalizing high-value trades. Prices change rapidly during events!
function calculateMushValue() {
// Get Inputs
var baseRarity = parseFloat(document.getElementById('rarityType').value);
var tierMult = parseFloat(document.getElementById('creatureTier').value);
var type = document.getElementById('tradeType').value;
var demandMult = parseFloat(document.getElementById('marketDemand').value);
var traitValue = parseFloat(document.getElementById('specialTrait').value);
var estimatedValue = 0;
var note = "";
// Logic split between Species and Stored
if (type === 'species') {
// Species Calculation
// Formula: Base Value * Demand * Tier Adjustment (Minor for specs)
// Tier multiplier is dampened for Species because rarity matters more than size
var dampenedTier = 1 + ((tierMult – 1) * 0.2);
estimatedValue = baseRarity * demandMult * dampenedTier;
note = "Value is for the permament unlock (Spec). Traits do not apply to Species items.";
} else {
// Stored Calculation
// Stored creatures are worth significantly less than species.
// Value is derived mostly from Growth Time (Tier) + Traits.
// Rare species storeds sell for more, but not full spec price.
var baseStoredPrice = 50; // Minimum effort price
// Growth value based on Tier (Time to grow)
var growthValue = tierMult * 100;
// Rarity Tax: If it's a very rare species (like Role Limited), the stored version is worth more
var rarityTax = 0;
if (baseRarity > 5000) {
rarityTax = 200; // Small premium for rare species access
}
if (baseRarity > 20000) {
rarityTax = 500; // Larger premium for exclusive species
}
// Gender Multiplier
var genderMult = 1.0;
if (type === 'stored_female') genderMult = 1.5; // Females valuable for nesting
if (type === 'stored_elder') genderMult = 2.0; // Elders take time
// Stored Formula
estimatedValue = (baseStoredPrice + growthValue + rarityTax) * genderMult * demandMult;
// Add Trait Value (Traits are flat value added on top)
estimatedValue += traitValue;
note = "Value is for a single save slot (Stored). Price heavily influenced by Traits and Growth stage.";
}
// Rounding for clean numbers
estimatedValue = Math.round(estimatedValue / 10) * 10;
// Formatting
var formattedValue = estimatedValue.toLocaleString();
// Output
var resultArea = document.getElementById('result-area');
var resultText = document.getElementById('finalMush');
var resultNote = document.getElementById('tradeNotes');
resultArea.style.display = "block";
resultText.innerHTML = formattedValue + " 🍄 Mush";
resultNote.innerText = note;
}