I saw a clip for The Tower of Druaga: Sword of Uruk volume 2 DVD. A large group of black, birdlike monsters swarm across a desert landscape attacking a group of soldiers. One party, most likely the main characters of the anime, take off running. The girl in the back trips over a branch or broken arrow and falls. The rest of the group only has enough time to turn around before the monsters fall upon them.
But when they turn, they see the monsters stopped cold at the edge of a large shadow. The girl had fallen in the shadow of a large rock and it seemed that the monsters were not able to leave the sunlight (despite being black and looking like shadow creatures or monsters of darkness).
This would work in Dhezhan.