Wheel of Fate

There are three lotteries at the Wheel of Fate: Bronze Lottery, Silver Lottery, and Gold Lottery. Only the bronze lottery is free to play once a day. Each lottery will have 8 possible prizes that can be won, every time the lottery is opened the list changes. This means it is possible to back out of the lottery before spinning to try for a better option of prizes.

How the lottery works
Along the sides of the lottery are various prizes next to a number of stars. In the center is the wheel of fate with eight stars. Once spun, if the wheel stops on a star, the star is collected and removed from the wheel. Then the wheel turns again. If the wheel stops on a space that no longer has a star, the spin is over. Extra spins may be bought, but there is no guarantee that the next spin will get any more stars. Once the player chooses not to take any more spins that may pick a single prize that has the same or less number of stars as they collected from the wheel.

Bronze Lottery
The bronze lottery is free to play once a day. Additional plays cost 80 gems. A single extra spin can be bought for 20 gems. Each additional extra spin cost 20 gems more than the previous. So a second extra spin would cost 40 gems, a third 60 gems, and so on.

Silver Lottery
The silver lottery offers slightly better prizes than the bronze lottery. The book of skills is much easier to win in the silver lottery. The rare reward of the Book of Knowledge is also available. The silver lottery costs 180 gems to play. A single extra spin can be bought for 70 gems. Each additional extra spin cost 70 gems more than the previous. So a second extra spin would cost 140 gems, a third 210 gems, and so on.

Gold Lottery
The gold lottery is the most expense and offers higher level charms, potions and easier chances of the book of skills and mastery. The silver lottery costs 350 gems to play. A single extra spin can be bought for 140 gems. Each additional extra spin cost 140 gems more than the previous. So a second extra spin would cost 280 gems, a third 420 gems, and so on.

Odds
The following table shows the chance of getting a price requiring a certain number of stars.