What do I need to be an authentic Sephiroth this upcoming Halloween and do you like evil bunnies???

I really want to go as the Kingdom Hearts 2 version of Sephiroth this year but I need to know what to use to make all that magic true? LOL!!! What do I need to make an authentic Sephiroth costume cause Im not buying. XD Oh yeah and arent evil bunnies cool?

Long silver hair awesome black trench coat and 6 foot long sword… and who DOESN’T like evil bunnies?!

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