Sylphs are an awesome spirit. BTW, a halberd is a type of blade attached to a pole. A halberd isn't always an axe attached to a stick. And besides, that looks more like a certain type of spear/lance (maybe not lance, but you know what I'm getting at, right?).
Yet another sw33t pic <^_^>'' I really like your drawing style, hey? It looks like something you'd see in a book depicting art from a game or anime. Cool weapon, too; as I tend to draw those alot myself, the one you drew caught my eye as much as Sylph herself did <^_^>''