{R} Darksteel Reactor [Edge of Eternities Commander][EOC 134]

Title
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Set: Edge of Eternities Commander
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 this artifact.
When this artifact has twenty or more charge counters on it, you win the game.