The Dark Collation

The Dark is a small set with 119 cards. There are 40 commons (C3), 43 uncommons (U2), and 35 rares (U1). There is also one C1 card (Maze of Ith) which has rarity between C3 and U2 (equivalent to U3). The printing was done in Belgium.

The Dark was sold in 8 card booster packs. Booster boxes had 60 packs.

Pack Anatomy

The Dark uses striped collation with 11 × 11 sheets. There are two print sheets: a common sheet with C3 and C1 cards, and an uncommon sheet with U2 and U1 cards. Each pack gets 6 cards from the common sheet and 2 cards from the uncommon sheet. Cards are back-facing with uncommon-common ordering.

Pictures of the both sheets exist. [1]

The common sheet may be split into the top 5 and bottom 6 rows (with stripes of width 2 to 4). Unlike Legends, a split box can still have commons from both halves of the sheet, as there are usually 2 or 3 independent sequences of commons in a box. Very rarely, a pack may contain cards from both halves of the sheet if there is a switch from one sequence to another midway through the pack. (The location of such splits doesn't seem to be related to the position on the sheet.) Not all boxes are split. In some cases of a non-split box, striped of width 7 were sometimes observed.

The uncommon sheet may or may not be split depending on the box. Both cases have been observed. In one of the boxes with an unsplit sheet, stripes of width 7 were somtimes observed. Uncommons usually have 2 independent sequences per box, so it is still possible to get uncommons from both halves of the sheet in a split box. Just because the commons are split in a box doesn't mean the uncommons are also split.

Common Sheet

40 commons appear on the sheet three times each, and the last slot is taken by Maze of Ith which appears only once.

Uncommon Sheet

43 uncommons appear on the sheet twice each (U2), and 35 appear only once (U1). Runesword has a variant printing where the an errant line (perhaps a hair) is visible in the text box. [2] It is currently not known if this is specific to a certain printing, a certain location on the print sheet, or both.

[1] The "Compilation of Uncut Sheets" thread on the Magic Librarities Forum has pictures of both sheets.

[2] The variant of Runesword is catalogued on Scryfall. Scryfall claims this variant affects one third of Runesword cards, but I don't know why they make this claim. (There are two on the sheet, after all.)