EXPOTION
EXAMPLE CLAN POTION CREATION:
Potions may be created and have up to two spells each. For this example,
we will create a second potion for the clan with two spells in it:
Cost for creating the 2nd potion is 500 diamonds.
Cost for adding spells is 250(a+(a+1)+...b),
where a = Current spell purchased, b = Desired spell purchased
Thus, since we are starting from scratch, we will be adding only one spell:
Current spell purchased = 1, Desired spell = 2,
a = 1, b = 2
Therefore,
price = 250(1+2) = 250*3 = = 750 diamonds
The total cost of creating this potion is: 500+750 = 1250 diamonds.