During either player's turn, when your opponent activates a Spell/Trap Card or monster effect that could make them discard when it resolves: You can send this card from your hand to the Graveyard; negate the activation, and if you do, destroy it.
Near Mint Unlimited - $0.50
Lightly Played Unlimited - $0.50
Moderately Played Unlimited - $0.40
Played Unlimited - $0.30
Near Mint 1st Edition - $0.60
Lightly Played 1st Edition - $0.60
Moderately Played 1st Edition - $0.50
Played 1st Edition - $0.40