Rocket Launcher [Antiquities] XY74 when your opponent activates a

when your opponent activates a card or effect

Set: Commander 2011 Type: Land Rarity: Common Gruul Turf enters the battlefield tapped

Soldevi machinist

Set: Amonkhet Prerelease Promos Type: Creature — Snake Hydra Rarity: Rare Cost: {5}{G} Trample

Negate an opponent's monster effect that activates by targeting the equipped monster

Rocket Launcher [Antiquities] XY74 when your opponent activates aSet: Antiquities Type: Artifact Rarity: Uncommon Cost: {4} {2}: Rocket Launcher deals 1 damage to any target. Destroy Rocket Launcher at the beginning of the next end step. Activate only if you've controlled Rocket Launcher continuously since the beginning of your most recent turn. What these devices lacked in subtlety, they made up in strength.