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The Seeres Sanctuem is an adventure module based on puzzles, mystery elements from The House of Three Sisters' labyrinthine dungeon. This system neutral Puzzle Dungeon and Adventure Module provides players with 10 rooms full of eyeball-related mysteries that require the use of magic items to solve them in true OSR fashion.The Seeres Sanctuem can be played as a one-shot or an introduction for further plans, but it's recommended at level 1 - 4 characters who are looking forward to discovering their own solutions with no restrictions on equipment choices and customizing every environment they visit through the use of magic items that change how players interact in previously explored areas.