Blade wasps

Like wasps, but bigger and with iron-infused stingers — though at least they're not venomous. A single sting from a blade wasp hurts, draws blood, and takes some effort not to cry out. When they swarm, take 1d6 damage (messy, ignores armor) and you're wracked with pain; doing anything other than curling up and writhing means Defy Danger. Each subsequent swarm hit increases the die one step, up to d12.

Kind Environmental or Procedural Threat