The odds of getting a certain cost of unit in your shop at each level, and the size of the unit pool for each cost, up to date for Set 12.
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Shop Odds at each level
The chance of getting a certain cost of champion in your shop at a each level.
Pool Sizes
The Pool Size (or Bag Size) is the number of each champion available in the shop. For each champion bought in the pool, the probability of hitting that champion decreases until it is empty.
1 Cost: 30 2 Cost: 25 3 Cost: 18 4 Cost: 10 5 Cost: 9
This impacts the number of 3-Star Champions that can be in the game at any one time. 1 Cost 3-Star requires a pool size of 9, 2 Cost 3-Star requires a pool size of 18, and 3 Cost 3-Star requires a pool size of 27. Tip: A Champion Duplicator can create a champion, even if the pool is empty.
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Good luck to you! – Cheng