It seems that XYZ is getting a bad rap because of how it promotes bads
>hand managment, but with this card, your XYZ troubles are over. The card 
>I'm referring to is Forced Requisition, a PSV rare. It simply says that 
>when you discard from your hand, your opponent must also discard from 
>their hand. This gives XYZ more playability because in order to use any of 
>the XYZ fusion effects, you must discard a card from your hand to use its 
>effect*. This allows the controller of XYZ  to feel more safe that 
>since  your opponent won't have a hand advantage over you because you are 
>discarding nearly all of your cards to get a field advantage.
>
>Note: This also works with XZ, YZ, and XY because to use their effects 
>you
>must discard one card from your hand.
>
>*Second note: The XYZ fusion effects works as followed:
>
>XYZ: Discard one card from your hand to destroy any card on your
>opponent's field.
>XZ: Discard one card from your hand to destroy one face down magic or trap 
>card on your opponent's side of the field
>YZ: Discard one card from your hand to destroy any face down monster on 
>your opponent's side of the field.
>XY: Discard one card from your hand to destroy one face up magic or trap 
>card on your opponents side of the field.