If you have collected this promo egg, then, at the end of a round, you can turn any one exploding (red) egg you've collected into a good (blue) egg. The catch is this: If you collected this promo egg, but otherwise have all good eggs at the end of a round, you have to turn one of your good eggs into an exploding egg! In either case, the number value of the egg stays the same but flip flops from positive to negative or vice versa (e.g., an exploding egg worth -10VP is now worth 10VP instead). This promo card was available through supporting Unpub 5.