Chaos Emerald - Lotus Petal (7037) [SLD - 7037] Condition:Near Mint Rules Text Contains: Prowess (Whenever

Rules Text Contains: Prowess (Whenever you cast a noncreature spell

Return that card to the battlefield under its owner's control at the beginning of that player's next end step

They only specify the consequences should you fail

Creature Type or Sub Type: Legendary Artifact – Equipment

Serialized Elven

Chaos Emerald - Lotus Petal (7037) [SLD - 7037] Condition:Near Mint Rules Text Contains: Prowess (WheneverRarity: M #: 7037 Creature Type or Sub Type: Artifact Rules Text Contains: T, Sacrifice this artifact: Add one mana of any color. Flavor: The ancient Chaos Emeralds possess unfathomable power. When all seven Emeralds are gathered, their power is amplified immeasurably.