Dullahan

The Dullahan is a headless rider, usually on a black horse, who carries their own head on their arm. Usually, the Dullahan is male, but there are some females out there.
The mouth is usually in a hideous grin that touches both sides of the head. Its eyes are constantly moving about and can see across the countryside even during the darkest nights. Its believed that where the Dullahan stops riding, a person is due to die. The Dullahan calls out the person's name, drawing away the soul of his victim, at which point the person immediately drops dead.
There are rumors that golden objects can force the Dullahan to disappear.