Cloudstone Curio [Ravnica: City of Guilds] Zombie Spirit you cannot declare an attack

you cannot declare an attack

if your opponent adds a card(s) from their Deck to their hand (except during the Draw Phase): You can send this card from your hand to the Graveyard

Set: Sun & Moon: Lost Thunder Type: Psychic Rarity: Promo Retreat cost: 1

−2: Mill two cards

you may return target creature card from your graveyard to the battlefield

Cloudstone Curio [Ravnica: City of Guilds] Zombie Spirit you cannot declare an attackSet: 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.