Urza's Incubator [Commander 2015] Worldwake Promos Set: Duelist Saga Card type:

Set: Duelist Saga Card type: Quick Play Spell Rarity: Ultra Rare Target 1 "Stardust" Synchro Monster you control

Sacrifice Bloodfire Colossus: It deals 6 damage to each creature and each player

Set: Betrayers of Kamigawa Type: Legendary Creature — Spirit Rarity: Rare Cost: {6}{G}{G} Snake offering (You may cast this card any time you could cast an instant by sacrificing a Snake and paying the difference in mana costs between this and the sacrificed Snake

it is unaffected by any Spell Cards

except "Delta The Magnet Warrior"

Urza's Incubator [Commander 2015] Worldwake Promos Set: Duelist Saga Card type:Set: 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