which sounds cooler

Night Lightning or Killer Cloud?

 

Neither because I read them as "nightlight" and "killer clown", and neither of those is cool.

 

I'm gonna say neither as well, but if I had to choose I'd go with 'Night Lightning'.

Clouds are not very badass.

EDIT: Oh, are you going to get your username changed to match your avatar? Either works, then. In fact Killer Cloud might be better than Night Lightning as a username <: .

 

Both sound extremely cheesy and unsexy. Just being honest, bro.

 

This. This reminds me of my life changing thread 'Should I change my name to Panda Scribble or Reptar?'

 

WTF, you could've gotten the name Panda Scribble instead of Reptar?!