What about locations themselves that are cursed/enchanted/so full of dark magic that they weaken anyone who goes near them? It's a gradual process and at first they just seem tired, maybe get the chills, a little distracted. But the longer they're in there the more serious the symptoms get; they become too weak to walk, they run a fever, their bones feel like they're on fire, maybe their senses become impaired, they hallucinate. Death will follow if they don't leave.
I'll take 10. Do you gift wrap?













