Unwinding Clock (Retro Schematic) [The Brothers' War Retro Artifacts] U-WTR004 {T}: Add X mana in

{T}: Add X mana in any combination of colors

Set: Prize Pack Series One Type: Colorless Rarity: Holo Rare Retreat cost: Colorless

that player can't cast spells or activate abilities and plays with their hand revealed

Set: World Championships 2009 Type: Psychic Rarity: Uncommon Retreat cost: Colorless

Set: March of the Machine Prerelease Promos Type: Sorcery Rarity: Rare Cost: {5}{B}{B} Each player mills ten cards

Unwinding Clock (Retro Schematic) [The Brothers' War Retro Artifacts] U-WTR004 {T}: Add X mana inSet: The Brothers' War Retro Artifacts Type: Artifact Rarity: Rare Cost: {4} Untap all artifacts you control during each other player's untap step. "Heat from the rotating mechanism is captured and converted into energy, allowing it to operate in perpetuity." *Rusko's Compendium of Clockwork"