Riftbound: League of Legends TCG alt art hit rates are confirmed ~2 per booster box. "Overnumber cards", which are special versions of alt arts created by some of Riot's own artists, will Amazon.com: Maestro Media The Binding of Isaac: Four Souls: Alt Art Booster MINI Expansion 15 Alternate Art Cards with Unique Abilities, Strategy Game for Kids & Adults, Ages 13+, 1 4 Players, 45 The Binding of Isaac: Four Souls Alt Art Booster Pack Maestro Media What are the odds of 2 alt arts in 1 box?! : r PokemonTCG We've just received confirmation from @davetron that each booster case will contain 6 booster boxes. Each box will contain, on average, 2 or more special alternate arts. This is a correction of The Binding of Isaac: Four Souls Alt Art Booster Pack Maestro Media