Darksteel Reactor [Darksteel] Dog Set: Black & White: Legendary

Set: Black & White: Legendary Treasures Type: Fire Rarity: Common Retreat cost: Colorless

Set: POP Series 3 Type: Lightning Rarity: Rare Retreat cost: Colorless

but you may put it on top of your library instead of into your graveyard

Set: Base Set Unlimited Type: Fighting Rarity: Rare Retreat cost: Colorless

Darksteel Reactor [Darksteel] Dog Set: Black & White: LegendarySet: Darksteel Type: Artifact Rarity: Rare Cost: {4} Indestructible (Effects that say "destroy" don't destroy this artifact.) At the beginning of your upkeep, you may put a charge counter on Darksteel Reactor. When Darksteel Reactor has twenty or more charge counters on it, you win the game.