Zahid, Djinn of the Lamp [Dominaria] Khans of Tarkir Promos (Return it only if it's

(Return it only if it's on the battlefield

Set: Planechase 2012 Type: Creature — Griffin Rarity: Uncommon Cost: {3}{W} Flying

Set: Shadowmoor Type: Sorcery Rarity: Uncommon Cost: {2}{R/G} Firespout deals 3 damage to each creature without flying if {R} was spent to cast this spell and 3 damage to each creature with flying if {G} was spent to cast this spell

Set: Antiquities Type: Enchantment Rarity: Uncommon Cost: {3}{G} Each noncreature artifact loses all abilities and becomes an artifact creature with power and toughness each equal to its converted mana cost

They only specify the consequences should you fail

Zahid, Djinn of the Lamp [Dominaria] Khans of Tarkir Promos (Return it only if it'sSet: Dominaria Type: Legendary Creature Djinn Rarity: Rare Cost: {4}{U}{U} You may pay {3}{U} and tap an untapped artifact you control rather than pay this spell's mana cost. Flying "I do as I please, little mortal. Do go on about your wishes, thoughthey amuse me to no end."