That Necrovalley effect is a continuous effect, not trigger effect.
Continuous effect need the card to be resolved from the chain first to obtain it's effect.
Cards (usually, obviously things like Super Polymerization exist) don't do anything until they resolve. This isn't rocket science. A card like Magic Jammer would literally do nothing if the Raigeki you chained it to magically already did its thing before you could chain to it.
That’s a terrible example because magic jammer would negate the activation, necrovalley negates you from removing cards from your GY from play. If nevrovalley was destroyed by twister or mystic space typhoon there wouldn’t be a debate
Anonymous
