Who's said plants need light to survive ? During the day, his power is manifested through the glowing light coming out of his eyes. But during the night, the light bursts through his very body, showing a glimpse of his true power, and his weakness...
Blodyn Tywyll is a sylvari male warrior... While the weapon is not my first choice ( I don't have the time to get the dominant greatsword, it would look awesome though on this guy ) I still think it's a great match, and it gives a little savage look to the character, don't you think ? Anyway, hope you like it :)