The vast land turned pitch black, no light and the demons couldn't see through the darkness at all. Demons weren't like any living beings, who required light or reflection to see, but this darkness was different. They couldn't see, all they sensed was the sound being produced around them.
The demons used their power to create fire to get rid of the darkness, but that was when they saw the horror of a cosmic being, the shadow of God's throne. Bodies scattered on the ground, shredded into pieces as they floated in the sea of demonic blood, dark as tar and thick as pus. They didn't know what had happened until they looked up and saw black feathers falling from the sky.
