Return of the Zombies vs Hand traps? (yugioh)?
So, you're asking if you can stop the resolution of a card that sends itself to the graveyard as a cost for its own effect, by removing that card from the graveyard? In general, absolutely not. If the resolution does somehow need the card to be present in the graveyard (for example if it's a monster that's about to special summon itself from there) then yes, you could stop that from resolving. In other cases, no way at all. Once an effect activates, it is almost completely independent from the card it activated from. That's why you can't stop a Normal Spell Card with MST. Yes the Normal spell remains on the field until the chain finishes, and yes, you could in theory chain MST to destroy it before it resolves. But it doesn't affect the resolution because the location of the card does not matter. Removing Ash Blossom & Joyous Spring from the graveyard in response to its activation, will in no way affect the resolution. It will resolve as normal no matter where the card has ended up in the meantime. "I know for a fact that if the hand trap is removed from the graveyard before it's effect activated he can't resolve it right?" That's impossible, there's no way to remove it in between the cost being paid and the effect being activated, it's the exact same moment. If you meant 'before the effect resolved', removing it from the graveyard before resolution will not stop the resolution in 99% of cases. " Like if I used d.d. crow against Sangan it's effect can't activate since it wasn't in the grave to resolve it or whatever am I right?" Nope. Once Sangan hits the graveyard, its trigger condition has been met. Chaining DD Crow to its activation will in no way stop the resolution - it doesn't NEED to be in the graveyard, why would it make a difference if it's no longer there? Even if I discarded Sangan as a cost to activate an effect (meaning the trigger has to wait until it can start a new chain) and you chained DD Crow to remove it right then, it will STILL be able to trigger after the chain completes because the condition was met correctly.