I gave it a shot, made two with different outer lines, but you choose wich one you like(if you do).
http://www.upload.ee/files/941785/DarkBankai.png.html
http://www.upload.ee/files/941791/DarkBankai2.png.html
Personally i like the first one.
Edit:
http://www.upload.ee/files/941875/No_Mercy2.png.html
http://www.upload.ee/files/941881/No_Mercy3.png.html
http://www.upload.ee/files/941886/No_Mercy_4.png.html
http://www.upload.ee/files/941785/DarkBankai.png.html
http://www.upload.ee/files/941791/DarkBankai2.png.html
Personally i like the first one.
Edit:
http://www.upload.ee/files/941875/No_Mercy2.png.html
http://www.upload.ee/files/941881/No_Mercy3.png.html
http://www.upload.ee/files/941886/No_Mercy_4.png.html