When did Nagato became such a badass?

Come to the dark side. You'll know how

THose are some impressive garters.

Who the hell sunk their Nagato?

And then Wo appears and says
"Look who i found wandering around, my friend here has a small problem with you.
It seems that you let her die and she's not too happy about that.
Now i think it is time that she repays the favor"

Ziljin said:

And then Wo appears and says
"Look who i found wandering around, my friend here has a small problem with you.
It seems that you let her die and she's not too happy about that.
Now i think it is time that she repays the favor"

Isn't that Sigma's quite from Mega Man X2 when he brought Fake Zero?