The wishing well is a well that can be visited after its map is dropped from the Underwater cave (once randomly from the first three quests). You can toss a candy in and you will get an option of three wishes; to mutiply your candies by 5, multiply your lollipops by 8, or give yourself lots of potions and scrolls. You can only do this once. For this reason it might be best to use it in the later game. 

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