Calvin and Hobbes by Bill Watterson for December 10, 1988
Calvin: A lone knight charges up the hill toward the giant cave at the top. Immediately the monstrous dragon lunges out and spews a raging fireball! The knight is fried to a crunchy crisp...his armor fused into a solid piece! The dragon circles overhead, daring other fools to come after him! Parent: Did you brush your teeth? Calvin: Come here and see!