Hypergeometric Calculator
Import a deck, sort cards into groups, then build a condition, like “at least one A and one B, but none of C or D”, to see the exact odds of it appearing in your opening hand.
Archidekt works. Moxfield blocks imports from our server, for a Moxfield deck, use Paste list (in Moxfield: More → Export).
Import a deck, sort cards into groups, then build a condition like “at least one A and one B, but no C or D” to see the odds of it in your opening hand.