Earth -56

In this negative Earth was where Bruce Wayne saw his parents get killed in front of him. Only this time, there's a difference. Joe Chill dropped his gun and young Bruce grabbed it and shot him a bunch of times until it was out of bullets.  After that, he then went to be trained by the League of Assassins, but in this world, without his code of no killing. He not only trained how to fight in combat but in every gun and weapon he could get. He needed a way to kill to make him an angel of death. A bat then crash through the window as he blasted it. Gordon of his Earth didn't approve his ways but Batman didn't stop.

He then gots out and kills every criminal out there. Protecting people in a cruel way. Alfred tried getting Bruce to stop but he wouldn't listen. He became known as the Grim Knight, a killing vigilante. Commissioner Gordon did what he could to stop Batman, even with Alfred's help but couldn't stop him. The Grim Knight was born. An assassin of the night and a new Dark Knight for the Batman Who Laughs.