My take on a possible Darkin.
Good day, I'm a desperate League of Legends player, artistical hobbyist and Custom Champion Designer.
While I'm loving to create a new Champion out of nothing, I do also love to draw him, even though it's just with a pencil.
However, one of my first Custom Champions is a Darkin who has two forms, the human form and the Darkin form. But since two weeks I've started to experiment with Zbrush, a program that has been also proven worthy by a new Rioter (Who also was on a presentation and showed Singed and Heimerdinger, how detailed and lovely they look).
Because I wanted to try it out, I experimented with it. I watched some couple tutorials and got my fingers on it. I started immediately to make the Head of the Darkin. His appearance is a bit similiar to Aatrox, but he's a bit bigger, a bit wider and has horns that comes out of his mouth. Half of his head is covered by a small helmet that actually looks like organic. Because he has extremely big wings that almost covers his body and aren't made for flying, but rather smashing the enemies with it - his horns had to be made looking forward and not backwards or in the air.
Here's my take on a possible Darkin. Mortalis, the Twisted Darkin.
Beware, I'm not professional and this was my first try on everything, I didn't even try to make something different to experiment with.
Mortalis-Head in front: http://halfsteps-neverworld.deviantart.com/art/Mortalis-Front-Head-433656018?q=gallery%3AHalfSteps-Neverworld%2F48121102&qo=13
Mortalis-Head on the side: http://halfsteps-neverworld.deviantart.com/art/Mortalis-Side-Head-433655996?q=gallery%3AHalfSteps-Neverworld%2F48121102&qo=12
I'm currently working on the whole body, but damn.. it's hard to make wings...