Forum:Question about herald monsters

I mean Herald_of_Orange_Light, Herald_of_Green_Light and Herald_of_Purple_Light. The card text says that by sending the card and a fairy-type monster from your hand you get to negate a card effect. But do I get the effect by sending the two cards to the graveyard if they are on my hand? Or do I need to send the Herald monster on the field to get its effect? Or are both situations correct to activate the card?