The whirlpool

Near the dam at Three Coven Lake's east edge, a great drain draws water into the river Sruth. Get too close and the current catches you, dragging you closer until you can no longer swim free — down the funnel and into the pipe (1d10+2 damage with advantage, ignores armor). Roll +CON: on a 10+ you're spat out into the river, alive but beaten; on a 7-9, you're out but mark a debility and lose some gear; on a 6- you emerge the same, and also at Death's Door.

Kind Environmental or Procedural Threat

1. They are caught in the current
2. They are dragged closer and can no longer swim or paddle free
3. Down the funnel they go