This calculator is arithmetic on a table, not a live mixer. Enter quantities from your own [🐉UPD] Heavyweight Fishing session. It will not click the shop.
Drop probability
Trait Reroll Odds
Estimate the chance of seeing a trait at least once. The default 0.1% is the published Mythical roll. Type another chance if you are checking Executioner or a common trait.
Chance of at least one success = 1 − (1 − chance per attempt) raised to the number of attempts.
Each reroll is treated as an independent try. 0.1 is the published Mythical chance. 2 is Legendary, 15 is Epic, and 30 is Rare. This is the chance of at least one success, not a schedule.
Material planner
Crystal Cost for Rerolls
Turn a reroll target into Crystals. The default price is 5 Crystals per reroll item at Nanjiang on Beginning Isle.
Required total = materials per upgrade × number of upgrades. Missing = max(required total − materials already owned, 0).
Nanjiang trades 5 Crystals for one trait reroll item. A 0.1% Mythical averages about 1,000 rerolls, or 5,000 Crystals. Change the price if your screen shows a different cost.
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