This week's Thoughtballoons character is the Superman-plaguing imp from the 5th Dimension, Mr. Mxyzptlk. If you're unfamiliar with the character, he's a magical sprite who likes to cause mayhem and can only be sent back to his home dimension by getting him to say his own name backwards. Kltpzyxm!
Fortunately, there's another DC character (one of my favourites) who's famous for her backwards spell casting ways...
Pop over to the Thoughtballoons site to read my story and see what the other guys have come up with for Mxyzptlk.