2017 · ソースブック（プレイを拡張するルール／オプション）
Dark Caverns
A GM supplement for adding detail and atmosphere to dark caverns during adventure preparation or play. It includes eight tables covering atypical caves, cavern encounters, legendary caves, natural hazards, cavern dressing, items found in a purple worm’s stomach, and discoveries in subterranean rivers.
ゲーム情報（人数、プレイ時間、対象年齢、クレジット）の出典：BoardGameGeek。