Forum:Destiny draw

can you use destiny draws effect (draw a card) after diamond dudes effect, to discard it to the graveyard, then activate it without discarding the destiny hero card??...alot of people in duels and tournaments have been saying they can draw a card without discarding the destiny hero card, while the diamond dudes effect clearly says to activate the spell cards effect from the graveyard and doesnt say anything about ignoring the card cost and discarding a destiny hero card is a part of the cards effect.