Ryuk is my favourite anime character so I just had to cosplay as him and bring him justice for being so awesome!
Since many people have asked, I made the mask using a basic plastic mask from a craft store and building Ryuuk's face out of modelling foam right over top, then used paper mache to solidify and smooth it out. Also put on a few strands of fake hair to make the V-shape on his forehead.
The shoulders are made out of artificial spider plants and simply spray painted black and attached to shoulder pads.
Awards
1st Place, Cosplay Lab's Death Note Look-alike contest.