I want your boxes of boosters.
The odds for the major releases are [number of URs / 90].
- For Warriors, Patriarchs, and Kings, it's 10 in 90, or about 11% [1 in 9] chance.
- For Apostles, with 16 URs, it's 16 in 90, or about 18% [about 1 in 6] chance.
- For Priests, I think it's 11 in 90, or about 12% [about 1 in 8] chance.
I don't know enough about how Angel Wars was printed to figure its odds.
[edit] Eh,
Bryon already did all the math... figures that a math teacher would beat me to it...