The world went from blue to indigo to an inky, unnatural darkness, like the shadow of an eclipse.

An unnatural darkness engulfs them as the two sisters rock together.

Behind her an unnatural darkness filled the room - deep shadows that gave John an eerie, gloomy feeling.

On March 6, 2000, at 6:02am, the entire planet was shrouded in unnatural darkness.

I hurtled through the unnatural darkness over the water.

All too soon an unnatural darkness loomed before them, and Chiisai knew that they were approaching the cavern.

Suddenly, a horse swept past Amalric, a vague bulk in the unnatural darkness.

Whatever caused that unnatural darkness, they were in the midst of it.

The darkness grew deeper, an unnatural darkness, for nightfall was some hours distant.

But the unnatural darkness of his surroundings unnerved Green more than anything or anybody he had ever encountered at sea.