The Mystery Booster is loaded with reprints from over forty previous Magic sets - but these reprints aren’t exactly what today’s Magic players are used to opening in their packs. Unlike customary reprints, Mystery Booster cards are presented in their original form - original frame, art, typesetting, expansion symbol, legal text, and all.

Contents per booster:
2 white commons or uncommons
2 blue commons or uncommons
2 black commons or uncommons
2 red commons or uncommons
2 green commons or uncommons
1 multicolor common or uncommon
1 artifact or land common or uncommon1 rare or mythic rare with the card frame introduced in Core Set 20151 card from before Core Set 2015 (can be a common, uncommon, rare or mythic rare)
1 "playtest card"—an original design that sometimes bends Magic’s traditional rules