The Codex is generated from the game's own data and its own wording: every class with its spells by slot, all 128 spells with the six runes each and the lines the spellbook prints for them, every passive and keystone, the bodies you meet in each region, the four regions and all 100 achievements with how each is counted.
Each class has a page of its sixteen spells, in slot order, followed by its passives. The entries for the Vane Tors and Vaneholt name the places and enemies you meet there and nothing of the story; the final encounter of the last region is left for you to find.
This wiki describes Morrowvane 0.50.419. The version is printed in the bottom-right corner of the title screen.
ClassesThe eight classes: pool, starting life, starting spells and all sixteen spells by slot.
MagusThe Magus's 16 spells with their runes, and its 41 passives and keystones.
GravecallerThe Gravecaller's 16 spells with their runes, and its 41 passives and keystones.
WardenThe Warden's 16 spells with their runes, and its 40 passives and keystones.
HuntsmanThe Huntsman's 16 spells with their runes, and its 41 passives and keystones.
ShadeThe Shade's 16 spells with their runes, and its 40 passives and keystones.
VowboundThe Vowbound's 16 spells with their runes, and its 40 passives and keystones.
Bog-ShamanThe Bog-Shaman's 16 spells with their runes, and its 43 passives and keystones.
BellringerThe Bellringer's 16 spells with their runes, and its 43 passives and keystones.
BestiaryThe enemies of each region: tier, life, level, affixes and the bounties that name them.
RegionsThe four regions in walking order: checkpoints, hubs, places and bounty boards.
AchievementsAll 100 achievements with exactly how each is counted; five stay sealed.