EXCREST
EXAMPLE CLAN CREST IMPROVEMENTS:
Crests can carry many benefits. For this example we will improve the armor
class from -10 to -20, strength from no bonus to +3, and hit point bonus from
+5 to +25:
Cost for armor class improvement is 5(a+(a+1)...+b),
where a = -(Current point purchased), b = -(Desired point)
Thus, to go from -10 armor class to -20 armor class:
Current point purchased = -11, Desired point = -20,
a = -(-11) = 11, b = -(-20) = 20
Therefore,
price = 5*(11+12+13+14+15+16+17+18+19+20) = 5*155 = 775 diamonds
Cost for strength improvement is 50(a+(a+1)...+b),
where a = Current point purchased, b = Desired point
Thus, to go from no strength bonus to a bonus of +3:
Current point purchased = 1, Desired point = 3,
a = 1, b = 3
Therefore,
price = 50*(1+2+3) = 50*6 = 300 diamonds
Cost for hit point improvement is 2(a+(a+1)...+b),
where a = Current point purchased, b = Desired point
Thus, to go from 5 hit points to 25:
Current point purchased = 6, Desired point = 25,
a = 6, b = 25
Therefore,
price = 2*(6+7+8+9+10+11+...+21+22+22+23+24+25) = 2*310 = 620 diamonds
The total cost of these improvements is: 775+300+620 = 1695 diamonds.