How to use it
- Choose the season you are in. The odds change when a new season starts, and every shop in that season uses them.
- Choose the rarity you are hunting. Leave "or better" ticked when a higher rarity would also do the job, and untick it when only that rarity fits, for a build waiting on one Legendary.
- Enter the Krowns you have and the price the game shows for your next reroll. If an effect makes rerolls cheaper, enter the lower price.
- Stag players with Extra Supplies set the free rerolls they still have this round: 1, 2 or 3 by the skill's level.
- Keep "Save enough Krowns to buy it" ticked, and the planner holds back the price of the structure you are looking for.
How to read the result
The big figure is the chance that at least one of the new shops you can pay for shows the rarity you picked. The list under it takes every reroll in order: what that one costs, what you have spent by then, and the chance so far. Rows past your budget are greyed out, so you can see what a few more Krowns would buy. The chance climbs quickly over the first rerolls and then levels off, while the price doubles each time, so the last reroll you can afford is usually the worst deal of the round.
A worked example
It is Summer and your build needs a Rare. One slot shows a Rare or better 10% of the time (7% Rare, 3% Epic), so a fresh shop of four has about a 34% chance. You hold 20 Krowns and keep 12 of them for the Rare itself, which leaves 8 for rerolls: the 2 and 4 Krown rerolls fit, the 8 Krown one does not. Two new shops give you a 57% chance. Playing Stag with two free rerolls, the same 8 Krowns pay for four new shops and the chance rises to 81%.
What the numbers assume
Each of the four slots rolls its rarity on its own, from the season's weights. Prices are the same for every structure of a rarity: 4, 8, 12, 18 and 24 Krowns from Common to Legendary. The pool count is how many structures the shop sells at that rarity. The figures cover the structure shop only; Fate cards have their own store, paid in Lore.
Two things follow from the weights. Spring never shows anything above Uncommon, so no Spring reroll finds a Rare. Legendaries start in Autumn at 2% a slot, which is why a build that needs one keeps a tile free and waits for Winter's 15%. The economy and shop guide covers when a reroll is worth its Krowns, and thestructures list shows what each rarity holds.