Darksteel Reactor [Darksteel] Mercadian Masques Set: Nemesis Type: Instant Rarity:

Set: Nemesis Type: Instant Rarity: Uncommon Cost: {3}{U} You may return two Islands you control to their owner's hand rather than pay this spell's mana cost

"Roam as you will

and that player can't activate abilities that aren't mana abilities

When it awoke

sacrifice Handcuffs and that player sacrifices three permanents

Darksteel Reactor [Darksteel] Mercadian Masques Set: Nemesis Type: Instant Rarity:Set: 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.