Satyr of the night

A satyr of the night is a satyr that is corrupted by shadow magic.

History
The history of the satyr of the night is a very well kept secret. Many consider the true history of these shadow-tainted creatures a secret closely guarded by the Sidhe lords of the Feywild, with conspiracy-minded scholars claiming that the ancient fey nobles were responsible for creating the first satyrs of the night.

A more frightening theory says that powefull Unseelie fey willingly purge all information on the origin of these wicked creatures. Those who find out too much about them find themself hunted by Unseelie assasins.

Origins
All satyr of the night were once normal satyrs that were transformed by shadow magic.

There are multiple ways a satyr can become this corrupted; One might choose this curruption to become more powerful and seek revenge on its enemies. Another might be lost in its current life and seek the escape in a new dark life.

The earliest appearance of a satyr of the night was during the war that split the Elves, Drow and Eladrin into three very different races. During this war powerful magic was used to rip the crossings between planes. Links between the shadowfell and feywild were formed, allowing shadow magic to seep trough.

These sites became the darkest places in the Feywild, creatures that lived there were tainted by this power. Many evil Fey can find their origins to those days.