Cloudstone Curio [Ravnica: City of Guilds] Legendary Artifact Set: Sun & Moon: Lost

Set: Sun & Moon: Lost Thunder Type: Lightning Rarity: Ultra Rare Retreat cost: Colorless

Set: EX: Power Keepers Type: Fire Rarity: Ultra Rare Retreat cost: Colorless

Set: Base Set Unlimited Type: Lightning Rarity: Promo Retreat cost: Colorless

Set: Sun & Moon: Unbroken Bonds Type: Darkness Rarity: Holo Rare Retreat cost: 0

sacrifice Dandân

Cloudstone Curio [Ravnica: City of Guilds] Legendary Artifact Set: Sun & Moon: LostSet: Ravnica: City of Guilds Type: Artifact Rarity: Rare Cost: {3} Whenever a nonartifact permanent enters the battlefield under your control, you may return another permanent you control that shares a permanent type with it to its owner's hand. It *wants* to remain a mystery, banishing the curious in favor of less inquisitive company.