Perilous Vault (Retro Schematic) (Serial Numbered) [The Brothers' War Retro Artifacts] World Championships 2005 if it has a +1/+1

if it has a +1/+1 counter on it

Artifact creature spells you cast have affinity for artifacts

(Leads to: Temple of Dumathoin) Fungi Cavern — Target creature gets -4/-0 until your next turn

Set: Innistrad: Crimson Vow Prerelease Promos Type: Enchantment Rarity: Mythic Cost: {2}{W}{W} As long as you control seven or more enchantments

Perilous Vault (Retro Schematic) (Serial Numbered) [The Brothers' War Retro Artifacts] World Championships 2005 if it has a +1/+1Set: The Brothers' War Retro Artifacts Type: Artifact Rarity: Mythic Cost: {4} {5}, {T}, Exile Perilous Vault: Exile all nonland permanents. "As the years passed, Urza turned his focus from the Thran to worlds beyond his own, seeking any spell or technology that might break the Phyrexian scourge." *Urza: From Prodigy to Planeswalker*