Orisus

The Orisus is a super natural creature that brings death messages to people.
With mystic energy channeling through its body, the Orisus can travel faster than the speed of sound. Dashing through the landscape, it plays melodic, whipering like sounds with its hollow horns to announce death sentences to people who are near death.
It can only be seen or beard by near death people. Since it runs so fast, it's often seen as a read flash. Then the song of death will be heard to the observer, telling him or her how much time is left.