necrovalley:as long as this card remains face-up on the field, all effects of magic, trap and/or effect monster cards that involve graveyards are negated blablabla gravekeepers gain 500 atk and def u now the drill...

the first line before de blablabla holds my question can necrovalley be negated by magic jammer

y i ask this? becuz it's confusing magic jammer says discard a card from ur hand to the GRAVEYARD is magic jammer negated becuz it involves the graveyard?

y yes?

y no?

yes magic jammer stops the activation of necrovalley

necrovalley stops effects that happen/target in the graveyard, i.e monster reborn brings monster from graveyard, bazoo targets 2 monsters to remove from the graveyard

Read the rulebook, my friend.

CHAIN, CHAIN, CHAIN.

thx people :) ..........................................................