Stifle (Invocation) [Amonkhet Invocations] Magic 2011 Promos not its controller

not its controller

Set: Friday Night Magic 2009 Type: Creature — Goblin Assassin Rarity: Rare Cost: {2}{B/R}{B/R} When Murderous Redcap enters the battlefield

Set: Beta Edition Type: Creature — Rat Rarity: Common Cost: {2}{B} Plague Rats's power and toughness are each equal to the number of creatures named Plague Rats on the battlefield

Set: Amonkhet Invocations Type: Enchantment Rarity: Mythic Cost: {2}{U}{U} Tap an untapped creature you control: Tap target artifact

At the beginning of each opponent's end step

Stifle (Invocation) [Amonkhet Invocations] Magic 2011 Promos not its controllerSet: Amonkhet Invocations Type: Instant Rarity: Mythic Cost: {U} Counter target activated or triggered ability. (Mana abilities can't be targeted.)