• Total of 15 Magic cards + 1 foil token in each booster
• Only  Brothers War boosters with Extended-Art cards

Each Collector Booster contains:

• 1 Foil alternate-frame rare or mythic rare that could be an extended-art, Commander extended-art, borderless, retro artifact, or retro schematic card, or serialized retro schematic card (in less than 1% of boosters)
• 2 Non-foil retro or schematic artifacts: Each Collector Booster contains 1 retro artifact and 1 schematic artifact, one of which will be rare or mythic rare.
• 1 Additional foil uncommon retro or schematic artifact
• 1 Transformers series card, which might be foil (in 21% of boosters) or Shattered Glass (in 12% of boosters) or both (in less than 1% of boosters)
• 1 Traditional foil rare or mythic rare
• 1 Non-foil borderless or extended-art rare or mythic rare
• 1 Non-foil extended-art Commander rare or mythic rare or Jumpstart rare
• 1 Traditional foil mech land
• 2 Traditional foil uncommons
• 4 Traditional foil commons
• 1 Traditional foil double-sided token