His head is funny.
His name is Adrian. He is one of my babies.


OMG TL;DR

---

They can not multiply and when they run out of feather on their head they die.
When the world was first made, the creators could not be sure if it where balanced.
To take care of the races they deemed unnecessary the would send these guys out to them. At least the ones that escaped the initial whip of their race. All these guys had to do was pluck one feather from the wings. The stem of the feather would harden and they would jam it in the skin of the creature they where after, killing them instantly.

Physically weak, they have an array of magic that falls under a more arcane style, often mistaken as necromancy by human historians. When attacking their form takes a change, skin becoming much more pale than before (though they are naturally rather pale to begin with) and the wings actually grow much larger.

Their numbers are quite small now, having been around since the start.

---