I painted this a long time ago.. on Oct 2010! as concept art for Etheron Online, a game developed by Cubinet Interactive Studio.
Mercurian is the name of her race, the name came from the word Mercury, the original concept was to give her metallic skin texture, look like mercury, but at the end we change it, make her skin look extremely pale.
She is a sorceress and she's using a mask as her magical weapon.
Colored in Photoshop CS3.