Cloud Key (Retro Schematic) (Serialized) [The Brothers' War Retro Artifacts] Squirrel Advisor Fear Manifest gets +1/+1 for

Fear Manifest gets +1/+1 for each card your opponents own in exile

build structures like research stations

all of which must bear the harbor symbol (an anchor)

1 box (300x365x98mm)

The thumb is said to bring its owner good luck up until the end of their life

Cloud Key (Retro Schematic) (Serialized) [The Brothers' War Retro Artifacts] Squirrel Advisor Fear Manifest gets +1/+1 forSet: The Brothers' War Retro Artifacts Type: Artifact Rarity: Rare Cost: {3} As Cloud Key enters the battlefield, choose artifact, creature, enchantment, instant, or sorcery. Spells you cast of the chosen type cost {1} less to cast. "A key only unlocks a door. Its wielder must choose whether to cross the threshold." *Hurkyl's Metaphysics, vol. II*