In the dark forest, there was a clearing where a debauched cult met under the full moon. Their wild eyes and crazed chants sent shivers down the spines of any who dared to get too close. The air was thick with an unholy energy, and the trees seemed to cower away from the site of their depravity.
One way is to use it to describe a character. For example, 'The debauched innkeeper had a glint in his eye that made the travelers uneasy. His lecherous grin and slovenly appearance hinted at the dark secrets he might be hiding in the cellar of his decrepit inn.'
Walking down the deserted alley, he felt a presence behind him and heard the slow, deliberate steps getting closer. It was a faceless figure in a tattered cloak. The figure seemed to glide rather than walk, and as it got closer, an icy chill filled the air. He tried to run, but his feet felt like they were stuck in quicksand. All he could do was watch as the figure reached out its long, bony fingers towards him.
In my attic, I found an old doll. Its eyes were black as coal. At night, I heard it moving. I turned on the light and saw it sitting on my bed, staring at me. I knew it was not a normal doll.