2019 · ソースブック（プレイを拡張するルール／オプション）

Rhapsody of Blood: Terra Incognita

Each generation, a blood moon brings a nightmare castle from outside reality into the world, corrupting the surrounding landscape. This system provides prompts and a deck of cards for creating the castle’s rooms, connections, wards, and monster commanders. Designed for use with Rhapsody of Blood, the generated castles can also be used in other dungeon-crawling tabletop RPGs. Optional rules support top-down or side-on maps, locks and keys, and havens scattered throughout the castle.