Note: One card of any rarity is Traditional Foil. Foil Borderless Fetch Land in < 1% of Boosters. Traditional Foil Land appears in 20% of Boosters. A regular Art card can be found in 30% of packs and a foil-stamped Signature Art card can be found in 5% of packs.
Every Collector Booster contains 7 alt-frame cards and a total of 10–12 Traditional Foil cards, plus the possibility of Foil-Etched cards, a Textured Foil card, or foil Serialized card (found in <1% of Boosters). Serialized cards are always in English but can be opened in Boosters of any language. They are mechanically identical to their non-serialized counterparts.
