Pact of Negation (Invocation) [Amonkhet Invocations] San Diego Comic-Con 2013 it gets +3/+3 until end

it gets +3/+3 until end of turn for each creature blocking it beyond the first

Enchant creature

Set: Invasion Type: Artifact Rarity: Rare Cost: {2} When Tsabo's Web enters the battlefield

Set: Aether Revolt Prerelease Promos Type: Legendary Artifact Rarity: Mythic Cost: {6} Whenever Gonti's Aether Heart or another artifact enters the battlefield under your control

Pact of Negation (Invocation) [Amonkhet Invocations] San Diego Comic-Con 2013 it gets +3/+3 until endSet: Amonkhet Invocations Type: Instant Rarity: Mythic Cost: {0} Counter target spell. At the beginning of your next upkeep, pay {3}{U}{U}. If you don't, you lose the game.