Empire of Flies

The caster lets out a scream of dark arcane energy as they exhale a thick cloud of black and green corpse flies. This cloud then spreads out to surround them in a 20 foot emanation. The cloud of flies makes a constant loud buzzing sound that can be heard up to 100 feet away, and the flies will desperately attempt to crawl into the eyes, nose, ears and mouths of any living creatures within their reach other than the caster.

The area inside the spell's radius is heavily obscured for everyone except the caster. Any creature who moves into the spell's area of effect, or starts their turn there must make a Wisdom save to be able to take any actions on their turn, other than moving out of the spell's area of effect. Creatures inside the area of effect who try to speak or cast a spell with a Verbal component must succeed on a Constitution save, on a failure they cannot be heard or understood, or the spell cannot be cast.