Darksteel Reactor [Darksteel] Kephalai Ally of Zendikar becomes a

Ally of Zendikar becomes a 5/5 Human Soldier Ally creature with indestructible that's still a planeswalker

Set: Urza's Legacy Type: Legendary Creature — Elemental Rarity: Rare Cost: {4}{G}{G} Shroud (This creature can't be the target of spells or abilities

While most power is used for ordinary

Set: Grand Prix Promos Type: Legendary Creature — Demon Mythic Cost: {4}{B}{B}{B}{B} Flying

Set: Mercadian Masques Type: Enchantment Rare Cost: {2}{G} Exile a creature you control: Add X mana of any one color

Darksteel Reactor [Darksteel] Kephalai Ally of Zendikar becomes aSet: Darksteel Type: Artifact 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.