"When I was Slade Wilson, I thought that with enough preparation, I would always win. But I was wrong. I was trapped in an unwinnable war, refusing to see the obvious answers right in front of me. The answers that are so clear to me now with victory right around the corner. To win, you need to adapt, and to adapt, you need to be able to laugh away all the restraints. Everything holding you back. You see... a Deathstroke who laughs... is a Deathstroke who always wins. And now, you'll join me too, son.. We'll rule the world.. Now.. Come to papa, my baby..." The Deathstroke who Laughs infects you with the Joker Toxin, slowly making you become a heartless, evil, sadistic version of yourself