Unwinding Clock (Retro Schematic) (Serial Numbered) [The Brothers' War Retro Artifacts] DYN175 and you may activate Comet

and you may activate Comet

Shield of Argive attacks

you gain 2 life and Klothys deals 2 damage to each opponent

{2}: Target Ninja creature can't be blocked this turn

The escape cost is equal to the card's mana cost plus exile three other cards from your graveyard

Unwinding Clock (Retro Schematic) (Serial Numbered) [The Brothers' War Retro Artifacts] DYN175 and you may activate CometSet: 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"