LOL, well the pic you chose had him wielding it. So I just assumed that's the version you wanted to use.
BK has two swords : a) the Ebony Blade, this is his original weapon and b) a generic Light Saber, this is what he used when he wanted to be free of the EB's corrupting influence.
If he has the EB, this fight will end in tears for Team DC. If he has the ghetto light saber (it doesn't even have a name), I'm going with Team DC.
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..even the outer hells are indifferent matters for they bow only to potent and archaic Nodens.