Kanstein Codex is an independent guide and information hub for Sword x Staff, the free-to-play idle-strategy fantasy RPG developed by Boltray Games. It helps players navigate the game’s progression, classes, resources, events and live-service updates, with information organized into practical guides and tools. Coverage includes all 14 classes and their builds, gift codes, Fantomon rankings, gacha rates and pity thresholds, relics, companions, currencies, seasons and regional maps.

The site also offers advice for beginners, free-to-play spending, leveling, guilds, co-op dungeons, arena play and playing on PC through an Android emulator. Its updates track version changes, code availability and seasonal preparation, while distinguishing information drawn from official posts and store listings from community consensus. Kanstein Codex presents itself as a resource for both new and experienced players, helping them plan character development, make informed choices about pulls and upgrades, and understand how exploration and idle progression work.

It is a guide site rather than the developer or publisher of Sword x Staff