Board Thread:General Discussion/@comment-173.74.86.89-20130531164034/@comment-114.76.208.109-20130602061409

It would make more sense if there were some sort of weighted summon chance for star category of cards maybe even each card has its own weighted summon chance. This would explain why some cards seem to appear more often than others.

Which means the summon formula for a particular card might look like:

Probability of Summoning = [Card Summon Chance]*[Card Star Category]*(1/[Total number of cards in rare summon])