Urza's Incubator [Commander 2015] Imp whenever a creature an opponent

whenever a creature an opponent controls blocks

• Put a +1/+1 counter on Aven Surveyor

{T}: The next time a source of your choice would deal damage to you this turn

Activate only during the declare attackers step and only if you've been attacked this step

Jiang Wei alone still strove with might and main: / Nine times more he fought the north—in vain

Urza's Incubator [Commander 2015] Imp whenever a creature an opponentSet: Commander 2015 Type: Artifact Rarity: Rare Cost: {3} As Urza's Incubator enters the battlefield, choose a creature type. Creature spells of the chosen type cost {2} less to cast. "Stop thinking like an artificer, Urza, and start thinking like a father!" Rayne, chancellor of the Tolarian Academy