Collector Booster

Magic Collector Boosters are booster packs targeted at collectors. Unlike Draft Boosters, which optimize the Draft experience with a lot of repetition and a huge number of commons, Collector Boosters are maximized for more diversity in content, with more rares, foils, extended art, borderless planeswalkers and showcase cards.
==History==
For Ravnica Allegiance, Wizards introduced the first Collector Boosters. They contain fifteen cards for $12.99:Hipster of the Coast on Twitter These featured:
* 2 foils of any rarity
* 3 rares/mythic rares
* 10 uncommons 
This was a very limited experimental test run. Collector Boosters were only available in Japan and North America, and even there they were not widely available.
Collector Boosters became a regular feature with the release of Throne of Eldraine. This version contained:
* 1 rare/mythic rare with extended art
* 1 foil rare/mythic rare
* 9 foil commons/uncommons
* 3 special-frame cards (showcase cards or borderless planeswalkers)
* 1 ancillary card (a new card that is connected to the set but doesn't appear in Draft Boosters. E.g. cards from Planeswalker decks or a Commander-focused card)
* 1 foil token
Contents of of Collector Boosters vary per set. As of Bloomburrow, the default composition is as follows:
Quantity	Type 	Chance of surprise
5 	Rare or Mythic Rare	12-13 cards are Traditional Foil6 cards have a booster Fun card frameCollector Booster-exclusive special treatment in 3% of boosters
4 	Uncommon 	12-13 cards are Traditional Foil6 cards have a booster Fun card frameCollector Booster-exclusive special treatment in 3% of boosters
5 	Common 	12-13 cards are Traditional Foil6 cards have a booster Fun card frameCollector Booster-exclusive special treatment in 3% of boosters
1 	Land 	12-13 cards are Traditional Foil6 cards have a booster Fun card frameCollector Booster-exclusive special treatment in 3% of boosters
1 	Double-sided token 	Non-playable card, excluded for draft.
===Booster Fun===
R&D introduced "Booster Fun" as the collective name that R&D use for the types of card frames (called card treatments ) that could appear in Collector Boosters: extended art, borderless planeswalkers and showcase cards. Booster Fun cards evolved from Masterpieces. The difference is that the Booster Fun cards are versions of cards in the set, not from outside of the set.
Foil and non-foil Booster Fun cards may also appear in regular Draft Boosters, but at a much lower rarity. Non-foils appear in the same rarity slot as the original card. Foil Booster Fun cards appear in a common slot like other foils.
Booster Fun was later also extended to Set Boosters cq Play Boosters..
==References==