Cloak of Flies

[ Voile de mouches ]
Prerequisite: 5th level

Description not available (not OGL).
But here is a summary:

Grant adv. on Charisma (Intimidation) checks and dis. on all other Charisma checks. Others creatures in area take poison damage.
Xanathar´s Guide to Everything
  1. DnD 5e Eldritch Invocations › Cloak of Flies