Constant Mists (Matt Linde) (SB) [World Championship Decks 1999] 273 you can negate the activation

you can negate the activation and destroy that card

Set: The Shining Darkness Card type: Counter Trap Rarity: Secret Rare Attack: 0 Defense: 0 Activate only when your opponent activates a Spell Card

if any monsters were sent to the Graveyard by this effect

If the player does

Constant Mists (Matt Linde) (SB) [World Championship Decks 1999] 273 you can negate the activationSet: World Championship Decks 1999 Type: Instant Rarity: Uncommon Cost: {1}{G} BuybackSacrifice a land. (You may sacrifice a land in addition to any other costs as you cast this spell. If you do, put this card into your hand as it resolves.) Prevent all combat damage that would be dealt this turn.