In a movie I did before revealing my lazer eye I say "Behold my eye and despair!" If that counts for anything? I also say "Playtimes over" when telling the heroes I'm serious. Finally while you can't see it I have a wineglass filled with fake blood that I wanted to throw on the ground before the fight but I was advised not too
Actually if I was in charge (I was only an actor, grip, PA, sound and other crap) I would've had the final fight in the movie differently. I wanted to teleport around the room laughing while shooting fireballs out of my jacket but alas it's a more of a physical fight with fists and swords.