Thank you so much for your suggestions and bug reports! We're sorry we didn't reflect much! Happy New Year!

+rep good trader
sry that i missed the trade, i got no notification...

31 luck
white 48%
blue 30%
purple 16%
gold 3%
rainbow 1%
Actually 2% chance to hit rainbow and 3% chance to hit gold

16 luck
white 57%
blue 28%
purple 11%
gold 2%
rainbow 0%
Actually 1% chance to hit rainbow and 2% chance to hit gold

Let's see 0 luck
white 66%
blue 26%
purple 7%
gold 1%
rainbow -1%
Here I think you can't get either gold or rainbow
Coz to hit gold you need to roll higher than 99

67% - 0.6 * luck for common
0.6%*
26% + 0.15% * luck for rare
7 + 0.3% * luck for epic
1% + 0.08333% * luck for legend
-1% + 0.0666% * luck for calamity
Caps at 100 luck
If the number is higher than common rates, you get a rare
If the number is higher than common rates + rare rates, you get an epic
If it's higher than common + rare + epic, you get a legend
Higher than common + rare + epic + legend, you get a calamity