Sasuke's word attack.

[DHOH]

The blue and black chakra sword attack he used to help capture kinshiki.. Any info on it?

 

[King Of Pop]

i think its enton and chidori he channelled his sword with. basically what he did at vote 2, instead he applied it here to his blade

 

[Vulpini]

Enton + Raiton (or just Enton) channeled through his sword.

 

[TNC Xlll]

Perhaps, he put enton on his blade just like he did in the game

 

[DHOH]

i think its enton and chidori he channelled his sword with. basically what he did at vote 2, instead he applied it here to his blade

Yea that could be what's causing the blue chakra.. A combination of both.