Whir of Invention [Aether Revolt Prerelease Promos] Scourge ) When Cao Ren

) When Cao Ren

{R}: Prevent the next 1 damage that would be dealt to Rock Hydra this turn

I will keep watch

Set: Tempest Type: Enchantment Rare Cost: {2}{G}{G} Any player may cast creature spells with converted mana cost 3 or less without paying their mana cost and as though they had flash

Set: Antiquities Type: Artifact Rare Cost: {1} {6}

Whir of Invention [Aether Revolt Prerelease Promos] Scourge ) When Cao RenSet: Aether Revolt Prerelease Promos Type: Instant Rarity: Rare Cost: {X}{U}{U}{U} Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.