Darksteel Reactor
Artifact
{4}
Mana Cost
4.0
Mana Value
-
USD Price
rare
Rarity
Oracle Text
Indestructible (Effects that say "destroy" don't destroy this artifact.)
At the beginning of your upkeep, you may put a charge counter on this artifact.
When this artifact has twenty or more charge counters on it, you win the game.