This is a war machine forged by the greek gods that is activated by violence. It pretty much beat the crap out of everyone who went up against it, in fact it tore martian manhunter in half.
basic idea of what it looks like
(http://i22.photobucket.com/albums/b329/thad55/Annihilator.jpg)
here is a representation of the actual color scheme
(http://i22.photobucket.com/albums/b329/thad55/Annihilator2.jpg)
this is the symbol on its chest
(http://i22.photobucket.com/albums/b329/thad55/Annihilatorsymbol.jpg)
There are some more pictures here
http://www.worldsfinestonline.com/WF/jlu/ (http://www.worldsfinestonline.com/WF/jlu/)