Sting

Melee Weapon Attack: +6 to hit, reach 5 ft., one creature. Hit: 13 (4d4+3) piercing damage plus 14 (4d6) poison damage or 8 (2d4+3) piercing damage plus 7 (2d6) poison damage if the swarm is bloodied.

Chaos Pheromones

The swarm emits a cloud of pheromones in the air in a 10-foot-radius. The cloud spreads around corners. Each non-khalkos creature in the area makes a DC 12 Intelligence saving throw. On a failure the creature is confused for 1 minute. It repeats the saving throw at the end of each of its turns ending the effect on itself on a success. If the creature makes its saving throw or the condition ends for it it is immune to the chaos pheromones of khalkos spawn for the next 24 hours.