Strixhaven Collation

Strixhaven is a large set with 105 commons, 80 uncommons, 69 rares (11 of which are double-faced), 21 mythic rares (5 of which are double-faced), and 63 additional cards in the Mystical Archive. This is an unusual set size influenced by special collation of lesson cards. Foil cards are included in booster packs with advertised rate of 33% of boosters. Draft boosters were printed in English in the US, Belgium, and Japan.

Strixhaven was sold in 15 card draft booster packs (which contain an additional ad card or double-faced card placeholder). Booster boxes have 36 packs.

US Pack Anatomy

The US printing uses sequential collation.

Packs are front-facing. There are 9 commons followed by a common or rare lesson, three uncommons, a rare, a Mystical Archive card, and an ad or placeholder card. (Uncommon lessons are among the three uncommons when they appear.) If there is a foil, it will displace a (non-lesson) common and appear after the Mystical Archive card.

There are two common runs. The A run contains 36 cards each appearing 3 times, and the B run contains 60 cards each appearing twice. (The remaining 9 commons are lessons.) Packs contain 3-4 A cards followed by 5-6 B cards. These numbers seem to remain true for packs with foils. To ensure all these commons are equally likely, 4 A packs should appear 1/4 of the time and 6 B packs 5/12 of the time (and the remaining 1/3 of packs have a foil).

The commons lessons are on a separate sheet from the rares (and mythic). The exact rate between these sheets is not known. My empirical data has 37/468 rare or mythic lessons. My guess is that rare and mythic lessons appear at the same rate as normal rares and mythics which would be an overall rate of 11/148 in this slot. (Common lessons seems to be a little bit too common.)

The uncommons are divided into an A run and a B run. Each has 40 distinct cards (where each card appears three times). Half of packs have three consecutive cards from the A run and the other half have three from the B run. (Because of the symmetry, the A and B labels are arbitrary.)

Placeholder cards appear about 15% of the time and ad cards appear otherwise. These are on different sheets.

Common Runs

The A common run consists of 36 different cards each appearing three times. It contains all the multicolor and colorless cards. The choice of first card is mostly arbitrary.

The B common run consists of 60 different cards each appearing twice. It consists of all the mono-color cards appearing in alternating white, blue, red, green, black order. The choice of first card is mostly arbitrary.

The common lesson run has each of the 9 cards appearing 13 times. The choice of first card is mostly arbitrary.

Uncommon Runs

The A uncommon run contains 40 cards each appearing three times. The choice of first card is mostly arbitrary.

The B uncommon run contains 40 cards each appearing three times. The choice of first card is mostly arbitrary.

The uncommon Mystical Archive run contains 18 distinct cards each appearing five times. (Probably this is a gutter-cut sheet.) The choice of first card is mostly arbitrary.

Token Run

Most of the marketing cards in Strixhaven have a token or emblem on the front face. In addition, there is a card that has an advertisement for MTG Arena on the front face. They are printed in a 121 card run with items appearing different numbers of times.

Token Rarity
Avatar × 2	Lukka, Wayward Bonder Emblem × 2	Rowan, Scholar of Sparks Emblem × 2
Inkling × 12	Treasure × 12	Spirit × 16
Elemental × 17	Fractal × 17	Pest × 17
Arena Ad Card × 24

Belgian Pack Anatomy

The Belgian printing uses sequential collation.

Packs are front-facing. There are 9 commons followed by a common or rare lesson, three uncommons, a rare, a Mystical Archive card, and an ad or placeholder card. (Uncommon lessons are among the three uncommons when they appear.) If there is a foil, it will displace a (non-lesson) common and appear after the Mystical Archive card.

There are three common runs. The A run contains 30 cards each appearing 4 times, and the B run contains 60 cards each appearing twice. The land run contains the six common non-basic lands. (The remaining 9 commons are lessons.) Packs contain 2-3 A cards followed by 0-1 lands, and 5-6 B cards. These numbers seem to remain true for packs with foils.

Uncommons are split into equal A and B runs with one or two A cards and one or two B cards appearing in each pack.

Common Runs

The A common run consists of 30 different cards each appearing four times. It contains all the multicolor and (non-land) colorless cards. The choice of first card is mostly arbitrary.

The B common run consists of 60 different cards each appearing twice. It consists of all the mono-color cards appearing in alternating white, red, green, blue, black order. The choice of first card is mostly arbitrary.

Uncommon Runs

The A uncommon run consists of 40 different cards each appearing three times. The choice of first card is mostly arbitrary.

The B uncommon run consists of 40 different cards each appearing three times. The choice of first card is mostly arbitrary.

Japanese Pack Anatomy

The Japanese printing uses sequential collation with 112 card sheets (which is the usual for Japan). Probably the sheets are 14 × 8.

Packs are front-facing starting with the ad or placeholder card and a Mystical Archive card, then the rare, 3 uncommons, a rare or common lesson, and 9 commons. If there is a foil, it will appear before the Mystical Archive card, displacing a common.

In Japanese language packs, the Mystical Archive card has a 50% chance to a special Japanese-only treatment. (However, there are also non-Japanese language packs printed in Japan that don't have this feature.)

There are 3 common runs: A, B, and C. A contains 24 distinct cards, and B and C each contain 36 distinct cards. Each pack gets 2 to 3 cards from A followed by 3 to 4 cards from B and 3 to 4 cards from C. This means packs are either 3-3-3, 2-3-4, or 2-4-3. Foil packs are always 2-3-3. This means, including foil packs, the third A card appears 1/6 of the time, and the fourth B card and fourth C card each appear 1/4 of the time.

Common Runs

The A common run consists of 24 different cards each appearing four times. The cards are mostly blue. The choice of first card is mostly arbitrary.

The B common run consists of 36 different cards each appearing three times. The cards are mostly black and green. The choice of first card is mostly arbitrary.

The C common run consists of 36 different cards each appearing three times. The cards are mostly red and white. The choice of first card is mostly arbitrary.