I guess this is a fair challenge for anypony who dared try and draw him. The Nocturne pony, from League of Legends. Thanks Dogmantra for linking me to this thread.
Type: Pegasus pony
Coat color: Artist's choice (See reference)
Mane color and style: Artist's choice (See reference)
Eye color: Artist's choice (See reference)
Cutie mark: Duskbringer Icon
Pose: Standing on his two hind legs, with the others raised in the air infront of him. See reference below.
Expressions: "Grrr" face. See reference below.
Accessories or costumes: The claws (things he has on his hands) on his two raised legs.
Cutie Mark Reference
Pose and Face Reference