Cast Spells
Discover N
Exile cards from the top of your library until you exile a nonland card with mana value N or less. You may cast it without paying its mana cost (only if its own mana value is ≤ N); otherwise put it into your hand. Put the rest on the bottom in a random order. (A refined, more controllable descendant of Cascade.)
Example cards
60 cards matching o:"Discover"
