Minion. If the minion takes damage from an attack or as the result of a failed saving throw, their hit points are reduced to 0. If the minion takes damage from another effect, they die if the damage equals or exceeds their hit point maximum, otherwise they take no damage.
Swarm. The swarm can occupy another creature's space and vice versa, and the swarm can move through any opening large enough for a tiny Blood Fly. The swarm can't regain hit points or gain temporary hit points.
Thousand Cuts (Group Attack). Melee Weapon Attack: +4 to hit (+1 for each minion in a group), one target in the swarm's space. Hit: 2 necrotic damage (multiplied by the number of minions that attacked a single target)
Description
A Corpsewing Fly is a tiny creature, ranging from 6 inches to a whole 1 foot. They have learned the concept of safety in numbers and are deadly when swarming an enemy. Their legs are sharp blades and their mouth cavities are full of equally sharp teeth. Either of these bites or slashes inflict rotting of the skin.