This is dumb also the luck isn't the same as the ACTUAL game it just picks a number 1 to 3 and decides the rarity so 3 4 and 5 stars each all have a 33.3% chance of being rolled UPDATE: Ignore everything above I integrated the luck system now, so it doesn't pick 1 to 3 anymore, now it's more accurate, goodluck.
You can press the x1 Luck button to increase the luck up to x3 Luck The x50 button just pulls 50 times.