Urza's Incubator [Urza's Destiny]

Set: Urza's Destiny 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, Academy Chancellor