Historical clue formulations

• Evil spirits — 2026-01-31
• Nighttime demons — 2025-10-05
• Nighttime demons — 2021-03-22
• Night demons — 2019-11-17
• Some evil spirits — 2019-10-16
• Evil spirits — 2016-12-24
• Spirits that victimize the sleeping — 2002-05-21
• Evil spirits — 2000-06-12
• Evil spirits — 1995-11-07