Soulfeaeasters are far more common than the general population knows about them. They are created and used by evil gods to gather power as they have no worshipers to draw from. The Feasters look for people in dangerous occupations and the elderly, so they are very common to adventurers, most of the time they are undetected and harmless until you die, they them fly off w your soul.
They are detected by any detection spell cast on them, reveals their presence to sight. They are only damaged by spells and have no other effect than to start ripping the soul of their victum after they are revealed.
Saying YES whenever you can(as long as it doesn't cost anything) is your job as DM.
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