No, you can't <__<
I summon Jack Returns! with 3 other Stargate cards, which one has a spell/trap block. >_>
So your traps go to hell. <-<
Your spell and trap cards would too =)
It can't only block the other player(s) traps and not yours too. Otherwise it would be banned from the actual game.
If it destroys the trap/spell cards and sends them to the graveyard as a flip-effect, then it's fine.
One word for you.
Jinzo. >_>
Damn, I forgot about him/her/it
Though I think it only blocks traps. Spells can still be used.
I remember that in the anime Joey used the magical dice card thing to add to his attack and won.