A single six-sided die of randomly chosen color and style, with an engraved word balloon containing the phrase "SON OF A BITCH!" inked in white in place of the "1" side pips. The ink for the other sides may be in a different color.
So tic-tac-toe ends only in stalemate now. Even checkers and the box game have run their course. What's next? Othello! Capture all the tokens and defend what you've won.