Board Thread:Questions and Answers/@comment-74.100.204.11-20150122005119/@comment-24659969-20150303212246

5 of Any combination for 1 rare ticket.

3 study + 2 accounting = 1 rare ticket

1 health + 4 cannon power = 1 rare ticket

That is why I said 1/5 rare ticket for each upgrade ball = 1 rare ticket for 5 upgrade balls.