A shadhahvar is a mythical Persian antelope with a single hollow branched horn.
Description
The magical horn had hollow ends which created the most beautiful and tempting melodies when the wind was blowing through them. When men or animals were drawn towards the pleasant notes, the shadhahvar would stomp them to death.
Theory
In Persia a single horn was the symbol for the highest cruelty and danger and therefore the shadhahvar was regarded as a dangerous beast.