The Marsh Fever

''Fifteen to twenty years ago, a plague hit Osteria. It was sourced to some sort of necrotic energy from some being brought in by a rift from the Shadowfell. This plague was strong enough that the clerics couldn't keep up with curing people, so they were forced to prioritize healing children before any others. A good portion of the population of Osteria was lost before they managed to get the plague under control. There is a small memorial statue, an obelisk outside of Osteria in the deep woods, to remember those lost in the plague.