Every Bloomburrow Collector Booster contains a total of 6 cards with special alt-frame treatments, including 1–3 Extended Art cards, 0–2 Borderless cards, and 3–4 Mystical Archive cards (2 foil etched and 1–2 traditional foils, with 1–3 Japanese alt-art variants). One foil etched Mystical Archive Rare, Mythic Rare, or Uncommon is always a foil etched Japanese alt-art Mystical Archive card.