The Black Ghoul was once a man who was a serial killer.  An angry mob threw the serial killer to drown in the swamp water.  However, the man was so evil that he did not die, instead becoming a wicked ghoul who rises from the waters to feed upon the living.

 

Image from The Pitiless Ghoul.

The Black Ghoul grabs Calvin.

 

Image from The Pitiless Ghoul.

The Black Ghoul captures Calvin.

 

Image from The Pitiless Ghoul.

Eeeaaat yoouuu....

 

Image from The Pitiless Ghoul.

The Black Ghoul eating somebody.