Kaylee Weinberg (AKA Animefreakkai) is pretty sewing-agile, she made this fantastic Malfatto costume and posted photos on her Cosplayer.com profile page.

Malfatto is a character from the video game "Assassin's Creed". In the game, he died in 1503 and was a member of the Templar Order, as well as a doctor notorious for killing courtesan.

You can check out Kaylee's site and discover other costumes she made.

This has been the longest and hardest costume that I have done to date. I started work on it when I first saw the design before the game actually came out. (almost a year ago) I just couldn’t resist doing such a cool plague doctor!

She even posted a tutorial for the mask here.