Hark! Who is that, prowling through the mini-mall parking lot! It is PsykoDragon, hands clutching a studded crowbar! He bellows mightily:
"I'm going to flog you so forcibly, your blood will flow counter-clockwise!!!"
Sounds good

I tried out my REAL name, & strangely enough, I got:
"I'm going to pound you so heinously, your blood will flow counter-clockwise!!!"
Which is freaky cuz my irl name has only 2 letters in common with my username, & otherwise has nothing to do with it! I wonder how the battle cry is calculated...
Other usernames I use brought up:
Lo! Who is that, rampaging over the candy store! It is xxxx, hands clutching two hardened pitas! And with a cruel roar, his voice cometh:
"I'm going to spank you until your rump glows!"
Zang! Who is that, running out of the tarmac! It is xxxx, hands clutching a jeweled meat hammer! He screams homicidally:
"You in some shit now, muhfuh! I pillage like a mad dog who can only get madder!!!"
Hark! Who is that, skulking through the terrain! It is xxxx, hands clutching a bladed baseball bat! He screams apocalyptically:
"I'm going to unleash oven cleaner in your pants!"