Cloudstone Curio [Ravnica: City of Guilds] Vampire Shaman if Nether Shadow is in

if Nether Shadow is in your graveyard with three or more creature cards above it

Creatures your opponents control get -2/-2

believe that humans sprang forth from Merfolk who adapted themselves in order to explore their last frontier

/ Which tells us the way to go

Put the rest on the bottom of your library in any order

Cloudstone Curio [Ravnica: City of Guilds] Vampire Shaman if Nether Shadow is inSet: 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.