Swarm of Insects
Creature
The Swarm of Insects is the marsh and the ruin made hostile: a droning cloud of biting flies, stinging wasps, or worse, rising from the stagnant water and the rotted dark to settle on anything warm and bleed it by a thousand small mouths at once. No armor turns them and no blade thins them. One walks fast, one covers the skin, and one prays the cloud loses interest before the venom and the blood-loss together bring a strong man to his knees.