The cost of this card becomes nearly irrelevant if targeting "Morphing Jar" to re-use its Flip Effect.
Though this card has limited use in real life, it is incredibly useful in Yu-Gi-Oh! The Sacred Cards. In this game, it can flip all of its controller's monsters face-down at no cost, letting them be flipped to use their normally-single-use effects twice. For instance, use it with "Revival Jam" to Summon four fairly powerful monsters.
This card is similarly powerful in Yu-Gi-Oh! Duelist of the Roses. Perhaps its greatest use is with "Magician of Faith", since this allows for theoretically-infinite recycling of Monster effects every turn, including effects that increase ATK. It is slightly riskier, though, in that it flips down the opponent's monsters as well.