Talk:Holiday Crates/@comment-5051663-20121224031701/@comment-5051663-20121224040801

But when are the two sets of probabilities used? If you don't get what you want, are you given a chance to re-roll? At what cost?

A simulation using 10,000,000 crates and only the first set of probabilities suggests that to finish the challenge you open on average 42.26 crates at a cost of 1225.5 crystals (minus 185 for the challenge reward). The minimum is 8 crates at a cost of 232 crystals (minus 185 for the challenge reward). You will never make a crystal profit on this challenge. There is no maximum. You could still be opening crates (with very bad luck) after 1,000,000 crates and 29,000,000 crystals, if you have that many.