Gravekeeper's Watcher
Edison Card Text
When your opponent activates a card that includes an effect whereby your opponent discards from his/her hand, send this card from your hand to the Graveyard to negate the activation and effect of the card and destroy it.
Dark Revelation Volume 1 • 2005-03-19
No targeting
No Damage Step effect
Banlist • Unlimited
Interactions
Can Gravekeeper's Watcher be activated in the Damage Step to negate Morphing Jar?!
Morphing Jar is flipped during the Damage Step.
No. Watcher cannot be activated in the Damage Step under Edison rulings.
Can Gravekeeper's Watcher negate Card Destruction?!
Card Destruction is activated.
Yes. Watcher can negate activations that would make the opponent discard.
Rulings
edisonformat.net
●You can activate the effect of Gravekeeper’s Watcher to negate Graceful Charity.
●You can't activate Gravekeeper’s Watcher during the Damage Step (such as against a Morphing Jar that is flipped by an attack).
●You can't activate Gravekeeper’s Watcher when a card is discarded as a cost, such as Magic Jammer, Kuriboh, Tribute to the Doomed, Thunder Dragon, or Type Zero Magic Crusher.
●You can't activate Gravekeeper’s Watcher against your opponent's Delinquent Duo because it makes YOU discard, not your opponent.
●You can't activate Gravekeeper's Watcher against the activation of your opponent's Mirage of Nightmare because it is possible that your opponent won't have to discard (for example, by having more than 4 cards in his hand).
●When Morphing Jar is Flip Summoned, you may chain the effect of Gravekeeper's Watcher, negating the Flip Effect of Morphing Jar and destroying it.
edisonformat.com
You can activate the effect of "Gravekeeper’s Watcher" to negate "Graceful Charity".
You cannot activate "Gravekeeper’s Watcher" during the Damage Step (such as against a "Morphing Jar" that is flipped by an attack).
You cannot activate "Gravekeeper’s Watcher" when a card is discarded as a cost, such as "Magic Jammer", "Kuriboh", "Tribute to the Doomed", "Thunder Dragon", or "Type Zero Magic Crusher".
You cannot activate "Gravekeeper’s Watcher" against your opponent's "Delinquent Duo" because it makes YOU discard, not your opponent.
You cannot activate "Gravekeeper's Watcher" against the activation of your opponent's "Mirage of Nightmare" because it is possible that your opponent will not have to discard (for example, by having more than 4 cards in his hand).
When "Morphing Jar" is Flip Summoned, you may chain the effect of "Gravekeeper's Watcher", negating the Flip Effect of "Morphing Jar" and destroying it.