This card is useful with Ominous Fortunetelling, because even if you guess the card in your opponent's hand wrong, you can surely remove it.
This card can easily get rid of Honest or at least check if your opponent has one or not before you attack. Just make sure you don't have too many valuable cards in your hand when you play this as you may not get them back.
Discard D.D. Scout Plane if you guess wrong, so your card won't be wasted and you can use it for a Tribute summon during the next turn.